Finding the Fourth Proportional to 12,796.40, 17,655.35 and 8,326.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,796.40 : 17,655.35 = 8,326.71 : x
2. Step 2: Convert to fraction form
   12,796.40/17,655.35 = 8,326.71/x
3. Step 3: Cross multiply
   12,796.40x = 17,655.35 × 8,326.71
4. Step 4: Simplify right side
   12,796.40x = 147,010,937.76
5. Step 5: Solve for x
   x = 147,010,937.76/12,796.40
6. Step 6: Final answer
   x = 11,488.47