Finding the Fourth Proportional to 123,989.27, 185,880.15 and 57,477.20

Step by Step Solution

1. Step 1: Write the proportion equation
   123,989.27 : 185,880.15 = 57,477.20 : x
2. Step 2: Convert to fraction form
   123,989.27/185,880.15 = 57,477.20/x
3. Step 3: Cross multiply
   123,989.27x = 185,880.15 × 57,477.20
4. Step 4: Simplify right side
   123,989.27x = 10,683,869,628.18
5. Step 5: Solve for x
   x = 10,683,869,628.18/123,989.27
6. Step 6: Final answer
   x = 86,167.70