Finding the Fourth Proportional to 12,766.20, 17,615.98 and 7,100.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,766.20 : 17,615.98 = 7,100.02 : x
2. Step 2: Convert to fraction form
   12,766.20/17,615.98 = 7,100.02/x
3. Step 3: Cross multiply
   12,766.20x = 17,615.98 × 7,100.02
4. Step 4: Simplify right side
   12,766.20x = 125,073,810.32
5. Step 5: Solve for x
   x = 125,073,810.32/12,766.20
6. Step 6: Final answer
   x = 9,797.26