Finding the Fourth Proportional to 81,565.94, 122,393.50 and 31,648.01

Step by Step Solution

1. Step 1: Write the proportion equation
   81,565.94 : 122,393.50 = 31,648.01 : x
2. Step 2: Convert to fraction form
   81,565.94/122,393.50 = 31,648.01/x
3. Step 3: Cross multiply
   81,565.94x = 122,393.50 × 31,648.01
4. Step 4: Simplify right side
   81,565.94x = 3,873,510,139.53
5. Step 5: Solve for x
   x = 3,873,510,139.53/81,565.94
6. Step 6: Final answer
   x = 47,489.31