Finding the Fourth Proportional to 99,935.67, 137,909.55 and 54,612.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,935.67 : 137,909.55 = 54,612.72 : x
2. Step 2: Convert to fraction form
   99,935.67/137,909.55 = 54,612.72/x
3. Step 3: Cross multiply
   99,935.67x = 137,909.55 × 54,612.72
4. Step 4: Simplify right side
   99,935.67x = 7,531,615,639.48
5. Step 5: Solve for x
   x = 7,531,615,639.48/99,935.67
6. Step 6: Final answer
   x = 75,364.64