Finding the Fourth Proportional to 139,835.88, 192,978.18 and 83,239.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,835.88 : 192,978.18 = 83,239.56 : x
2. Step 2: Convert to fraction form
   139,835.88/192,978.18 = 83,239.56/x
3. Step 3: Cross multiply
   139,835.88x = 192,978.18 × 83,239.56
4. Step 4: Simplify right side
   139,835.88x = 16,063,418,792.80
5. Step 5: Solve for x
   x = 16,063,418,792.80/139,835.88
6. Step 6: Final answer
   x = 114,873.37