Finding the Fourth Proportional to 99,305,812.78, 137,060,994.41 and 65,756,116.96

Step by Step Solution

1. Step 1: Write the proportion equation
   99,305,812.78 : 137,060,994.41 = 65,756,116.96 : x
2. Step 2: Convert to fraction form
   99,305,812.78/137,060,994.41 = 65,756,116.96/x
3. Step 3: Cross multiply
   99,305,812.78x = 137,060,994.41 × 65,756,116.96
4. Step 4: Simplify right side
   99,305,812.78x = 9,012,598,779,077,866
5. Step 5: Solve for x
   x = 9,012,598,779,077,866/99,305,812.78
6. Step 6: Final answer
   x = 90,756,004.37