Finding the Fourth Proportional to 57,238.64, 78,978.12 and 31,743.98

Step by Step Solution

1. Step 1: Write the proportion equation
   57,238.64 : 78,978.12 = 31,743.98 : x
2. Step 2: Convert to fraction form
   57,238.64/78,978.12 = 31,743.98/x
3. Step 3: Cross multiply
   57,238.64x = 78,978.12 × 31,743.98
4. Step 4: Simplify right side
   57,238.64x = 2,507,079,861.72
5. Step 5: Solve for x
   x = 2,507,079,861.72/57,238.64
6. Step 6: Final answer
   x = 43,800.48