Finding the Fourth Proportional to 81,565.02, 122,354.82 and 31,643.91

Step by Step Solution

1. Step 1: Write the proportion equation
   81,565.02 : 122,354.82 = 31,643.91 : x
2. Step 2: Convert to fraction form
   81,565.02/122,354.82 = 31,643.91/x
3. Step 3: Cross multiply
   81,565.02x = 122,354.82 × 31,643.91
4. Step 4: Simplify right side
   81,565.02x = 3,871,784,912.15
5. Step 5: Solve for x
   x = 3,871,784,912.15/81,565.02
6. Step 6: Final answer
   x = 47,468.69