Finding the Fourth Proportional to 139,419.90, 192,416.04 and 82,831.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,419.90 : 192,416.04 = 82,831.50 : x
2. Step 2: Convert to fraction form
   139,419.90/192,416.04 = 82,831.50/x
3. Step 3: Cross multiply
   139,419.90x = 192,416.04 × 82,831.50
4. Step 4: Simplify right side
   139,419.90x = 15,938,109,217.26
5. Step 5: Solve for x
   x = 15,938,109,217.26/139,419.90
6. Step 6: Final answer
   x = 114,317.32