Finding the Fourth Proportional to 93,131.55, 139,731.12 and 57,551.40

Step by Step Solution

1. Step 1: Write the proportion equation
   93,131.55 : 139,731.12 = 57,551.40 : x
2. Step 2: Convert to fraction form
   93,131.55/139,731.12 = 57,551.40/x
3. Step 3: Cross multiply
   93,131.55x = 139,731.12 × 57,551.40
4. Step 4: Simplify right side
   93,131.55x = 8,041,721,579.57
5. Step 5: Solve for x
   x = 8,041,721,579.57/93,131.55
6. Step 6: Final answer
   x = 86,347.98