Finding the Fourth Proportional to 90,206.72, 124,520.16 and 80,758.88

Step by Step Solution

1. Step 1: Write the proportion equation
   90,206.72 : 124,520.16 = 80,758.88 : x
2. Step 2: Convert to fraction form
   90,206.72/124,520.16 = 80,758.88/x
3. Step 3: Cross multiply
   90,206.72x = 124,520.16 × 80,758.88
4. Step 4: Simplify right side
   90,206.72x = 10,056,108,659.02
5. Step 5: Solve for x
   x = 10,056,108,659.02/90,206.72
6. Step 6: Final answer
   x = 111,478.49