Finding the Fourth Proportional to 81,669.76, 122,446.72 and 31,707.74

Step by Step Solution

1. Step 1: Write the proportion equation
   81,669.76 : 122,446.72 = 31,707.74 : x
2. Step 2: Convert to fraction form
   81,669.76/122,446.72 = 31,707.74/x
3. Step 3: Cross multiply
   81,669.76x = 122,446.72 × 31,707.74
4. Step 4: Simplify right side
   81,669.76x = 3,882,508,761.61
5. Step 5: Solve for x
   x = 3,882,508,761.61/81,669.76
6. Step 6: Final answer
   x = 47,539.12