Finding the Fourth Proportional to 99,385.88, 137,152.98 and 54,064.28

Step by Step Solution

1. Step 1: Write the proportion equation
   99,385.88 : 137,152.98 = 54,064.28 : x
2. Step 2: Convert to fraction form
   99,385.88/137,152.98 = 54,064.28/x
3. Step 3: Cross multiply
   99,385.88x = 137,152.98 × 54,064.28
4. Step 4: Simplify right side
   99,385.88x = 7,415,077,113.55
5. Step 5: Solve for x
   x = 7,415,077,113.55/99,385.88
6. Step 6: Final answer
   x = 74,608.96