Finding the Fourth Proportional to 99,738,880,327.78, 137,639,729,059.21 and 54,013,510,683.43

Step by Step Solution

1. Step 1: Write the proportion equation
   99,738,880,327.78 : 137,639,729,059.21 = 54,013,510,683.43 : x
2. Step 2: Convert to fraction form
   99,738,880,327.78/137,639,729,059.21 = 54,013,510,683.43/x
3. Step 3: Cross multiply
   99,738,880,327.78x = 137,639,729,059.21 × 54,013,510,683.43
4. Step 4: Simplify right side
   99,738,880,327.78x = 7,434,404,976,003,774,414,848
5. Step 5: Solve for x
   x = 7,434,404,976,003,774,414,848/99,738,880,327.78
6. Step 6: Final answer
   x = 74,538,684,929.81