Finding the Fourth Proportional to 12,867.55, 17,755.72 and 7,202.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,867.55 : 17,755.72 = 7,202.61 : x
2. Step 2: Convert to fraction form
   12,867.55/17,755.72 = 7,202.61/x
3. Step 3: Cross multiply
   12,867.55x = 17,755.72 × 7,202.61
4. Step 4: Simplify right side
   12,867.55x = 127,887,526.43
5. Step 5: Solve for x
   x = 127,887,526.43/12,867.55
6. Step 6: Final answer
   x = 9,938.77