Finding the Fourth Proportional to 99,385.68, 137,151.18 and 54,064.56

Step by Step Solution

1. Step 1: Write the proportion equation
   99,385.68 : 137,151.18 = 54,064.56 : x
2. Step 2: Convert to fraction form
   99,385.68/137,151.18 = 54,064.56/x
3. Step 3: Cross multiply
   99,385.68x = 137,151.18 × 54,064.56
4. Step 4: Simplify right side
   99,385.68x = 7,415,018,200.18
5. Step 5: Solve for x
   x = 7,415,018,200.18/99,385.68
6. Step 6: Final answer
   x = 74,608.52