Finding the Fourth Proportional to 81,250.90, 121,863.98 and 31,323.72

Step by Step Solution

1. Step 1: Write the proportion equation
   81,250.90 : 121,863.98 = 31,323.72 : x
2. Step 2: Convert to fraction form
   81,250.90/121,863.98 = 31,323.72/x
3. Step 3: Cross multiply
   81,250.90x = 121,863.98 × 31,323.72
4. Step 4: Simplify right side
   81,250.90x = 3,817,233,187.61
5. Step 5: Solve for x
   x = 3,817,233,187.61/81,250.90
6. Step 6: Final answer
   x = 46,980.81