Finding the Fourth Proportional to 57,238.31, 78,986.12 and 31,742.69

Step by Step Solution

1. Step 1: Write the proportion equation
   57,238.31 : 78,986.12 = 31,742.69 : x
2. Step 2: Convert to fraction form
   57,238.31/78,986.12 = 31,742.69/x
3. Step 3: Cross multiply
   57,238.31x = 78,986.12 × 31,742.69
4. Step 4: Simplify right side
   57,238.31x = 2,507,231,367.82
5. Step 5: Solve for x
   x = 2,507,231,367.82/57,238.31
6. Step 6: Final answer
   x = 43,803.38