Finding the Fourth Proportional to 139,498.40, 192,508.56 and 82,140.22

Step by Step Solution

1. Step 1: Write the proportion equation
   139,498.40 : 192,508.56 = 82,140.22 : x
2. Step 2: Convert to fraction form
   139,498.40/192,508.56 = 82,140.22/x
3. Step 3: Cross multiply
   139,498.40x = 192,508.56 × 82,140.22
4. Step 4: Simplify right side
   139,498.40x = 15,812,695,470.28
5. Step 5: Solve for x
   x = 15,812,695,470.28/139,498.40
6. Step 6: Final answer
   x = 113,353.96