Finding the Fourth Proportional to 57,238.41, 78,989.59 and 31,745.28

Step by Step Solution

1. Step 1: Write the proportion equation
   57,238.41 : 78,989.59 = 31,745.28 : x
2. Step 2: Convert to fraction form
   57,238.41/78,989.59 = 31,745.28/x
3. Step 3: Cross multiply
   57,238.41x = 78,989.59 × 31,745.28
4. Step 4: Simplify right side
   57,238.41x = 2,507,546,651.64
5. Step 5: Solve for x
   x = 2,507,546,651.64/57,238.41
6. Step 6: Final answer
   x = 43,808.81