Finding the Fourth Proportional to 81,402.72, 112,390.62 and 50,822.43

Step by Step Solution

1. Step 1: Write the proportion equation
   81,402.72 : 112,390.62 = 50,822.43 : x
2. Step 2: Convert to fraction form
   81,402.72/112,390.62 = 50,822.43/x
3. Step 3: Cross multiply
   81,402.72x = 112,390.62 × 50,822.43
4. Step 4: Simplify right side
   81,402.72x = 5,711,964,417.61
5. Step 5: Solve for x
   x = 5,711,964,417.61/81,402.72
6. Step 6: Final answer
   x = 70,169.21