Finding the Fourth Proportional to 122,306.15, 168,626.25 and 79,209.50

Step by Step Solution

1. Step 1: Write the proportion equation
   122,306.15 : 168,626.25 = 79,209.50 : x
2. Step 2: Convert to fraction form
   122,306.15/168,626.25 = 79,209.50/x
3. Step 3: Cross multiply
   122,306.15x = 168,626.25 × 79,209.50
4. Step 4: Simplify right side
   122,306.15x = 13,356,799,710.20
5. Step 5: Solve for x
   x = 13,356,799,710.20/122,306.15
6. Step 6: Final answer
   x = 109,207.92