Finding the Fourth Proportional to 57,152.79, 78,871.49 and 31,659.55

Step by Step Solution

1. Step 1: Write the proportion equation
   57,152.79 : 78,871.49 = 31,659.55 : x
2. Step 2: Convert to fraction form
   57,152.79/78,871.49 = 31,659.55/x
3. Step 3: Cross multiply
   57,152.79x = 78,871.49 × 31,659.55
4. Step 4: Simplify right side
   57,152.79x = 2,497,035,525.75
5. Step 5: Solve for x
   x = 2,497,035,525.75/57,152.79
6. Step 6: Final answer
   x = 43,690.53