Finding the Fourth Proportional to 13,322.66, 18,385.82 and 7,659.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,322.66 : 18,385.82 = 7,659.18 : x
2. Step 2: Convert to fraction form
   13,322.66/18,385.82 = 7,659.18/x
3. Step 3: Cross multiply
   13,322.66x = 18,385.82 × 7,659.18
4. Step 4: Simplify right side
   13,322.66x = 140,820,304.83
5. Step 5: Solve for x
   x = 140,820,304.83/13,322.66
6. Step 6: Final answer
   x = 10,569.98