Finding the Fourth Proportional to 139,834.59, 209,934.82 and 83,012.23

Step by Step Solution

1. Step 1: Write the proportion equation
   139,834.59 : 209,934.82 = 83,012.23 : x
2. Step 2: Convert to fraction form
   139,834.59/209,934.82 = 83,012.23/x
3. Step 3: Cross multiply
   139,834.59x = 209,934.82 × 83,012.23
4. Step 4: Simplify right side
   139,834.59x = 17,427,157,562.85
5. Step 5: Solve for x
   x = 17,427,157,562.85/139,834.59
6. Step 6: Final answer
   x = 124,626.94