Finding the Fourth Proportional to 123,871.14, 185,656.59 and 57,172.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123,871.14 : 185,656.59 = 57,172.50 : x
2. Step 2: Convert to fraction form
   123,871.14/185,656.59 = 57,172.50/x
3. Step 3: Cross multiply
   123,871.14x = 185,656.59 × 57,172.50
4. Step 4: Simplify right side
   123,871.14x = 10,614,451,391.78
5. Step 5: Solve for x
   x = 10,614,451,391.78/123,871.14
6. Step 6: Final answer
   x = 85,689.46