Finding the Fourth Proportional to 99,407.68, 137,184.24 and 54,086.56

Step by Step Solution

1. Step 1: Write the proportion equation
   99,407.68 : 137,184.24 = 54,086.56 : x
2. Step 2: Convert to fraction form
   99,407.68/137,184.24 = 54,086.56/x
3. Step 3: Cross multiply
   99,407.68x = 137,184.24 × 54,086.56
4. Step 4: Simplify right side
   99,407.68x = 7,419,823,627.81
5. Step 5: Solve for x
   x = 7,419,823,627.81/99,407.68
6. Step 6: Final answer
   x = 74,640.35