Finding the Fourth Proportional to 125,419.61, 188,158.15 and 54,354.18

Step by Step Solution

1. Step 1: Write the proportion equation
   125,419.61 : 188,158.15 = 54,354.18 : x
2. Step 2: Convert to fraction form
   125,419.61/188,158.15 = 54,354.18/x
3. Step 3: Cross multiply
   125,419.61x = 188,158.15 × 54,354.18
4. Step 4: Simplify right side
   125,419.61x = 10,227,181,953.57
5. Step 5: Solve for x
   x = 10,227,181,953.57/125,419.61
6. Step 6: Final answer
   x = 81,543.72