Finding the Fourth Proportional to 57,018, 78,687.27 and 31,867.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,018 : 78,687.27 = 31,867.50 : x
2. Step 2: Convert to fraction form
   57,018/78,687.27 = 31,867.50/x
3. Step 3: Cross multiply
   57,018x = 78,687.27 × 31,867.50
4. Step 4: Simplify right side
   57,018x = 2,507,566,576.73
5. Step 5: Solve for x
   x = 2,507,566,576.73/57,018
6. Step 6: Final answer
   x = 43,978.51