Finding the Fourth Proportional to 99,506.71, 149,270.52 and 57,385.83

Step by Step Solution

1. Step 1: Write the proportion equation
   99,506.71 : 149,270.52 = 57,385.83 : x
2. Step 2: Convert to fraction form
   99,506.71/149,270.52 = 57,385.83/x
3. Step 3: Cross multiply
   99,506.71x = 149,270.52 × 57,385.83
4. Step 4: Simplify right side
   99,506.71x = 8,566,012,684.73
5. Step 5: Solve for x
   x = 8,566,012,684.73/99,506.71
6. Step 6: Final answer
   x = 86,084.78