Finding the Fourth Proportional to 139,879.57, 210,002.27 and 83,057.23

Step by Step Solution

1. Step 1: Write the proportion equation
   139,879.57 : 210,002.27 = 83,057.23 : x
2. Step 2: Convert to fraction form
   139,879.57/210,002.27 = 83,057.23/x
3. Step 3: Cross multiply
   139,879.57x = 210,002.27 × 83,057.23
4. Step 4: Simplify right side
   139,879.57x = 17,442,206,839.91
5. Step 5: Solve for x
   x = 17,442,206,839.91/139,879.57
6. Step 6: Final answer
   x = 124,694.46