Finding the Fourth Proportional to 139,222.76, 208,565.34 and 83,107.70

Step by Step Solution

1. Step 1: Write the proportion equation
   139,222.76 : 208,565.34 = 83,107.70 : x
2. Step 2: Convert to fraction form
   139,222.76/208,565.34 = 83,107.70/x
3. Step 3: Cross multiply
   139,222.76x = 208,565.34 × 83,107.70
4. Step 4: Simplify right side
   139,222.76x = 17,333,385,707.12
5. Step 5: Solve for x
   x = 17,333,385,707.12/139,222.76
6. Step 6: Final answer
   x = 124,501.09