Finding the Fourth Proportional to 12,909.12, 17,814.24 and 7,604.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,909.12 : 17,814.24 = 7,604.28 : x
2. Step 2: Convert to fraction form
   12,909.12/17,814.24 = 7,604.28/x
3. Step 3: Cross multiply
   12,909.12x = 17,814.24 × 7,604.28
4. Step 4: Simplify right side
   12,909.12x = 135,464,468.95
5. Step 5: Solve for x
   x = 135,464,468.95/12,909.12
6. Step 6: Final answer
   x = 10,493.70