Finding the Fourth Proportional to 57,200.64, 78,935.49 and 31,706.55

Step by Step Solution

1. Step 1: Write the proportion equation
   57,200.64 : 78,935.49 = 31,706.55 : x
2. Step 2: Convert to fraction form
   57,200.64/78,935.49 = 31,706.55/x
3. Step 3: Cross multiply
   57,200.64x = 78,935.49 × 31,706.55
4. Step 4: Simplify right side
   57,200.64x = 2,502,771,783.42
5. Step 5: Solve for x
   x = 2,502,771,783.42/57,200.64
6. Step 6: Final answer
   x = 43,754.26