Finding the Fourth Proportional to 81,630.18, 122,434.34 and 31,705.43

Step by Step Solution

1. Step 1: Write the proportion equation
   81,630.18 : 122,434.34 = 31,705.43 : x
2. Step 2: Convert to fraction form
   81,630.18/122,434.34 = 31,705.43/x
3. Step 3: Cross multiply
   81,630.18x = 122,434.34 × 31,705.43
4. Step 4: Simplify right side
   81,630.18x = 3,881,832,625.77
5. Step 5: Solve for x
   x = 3,881,832,625.77/81,630.18
6. Step 6: Final answer
   x = 47,553.89