Finding the Fourth Proportional to 13,321.59, 18,384.41 and 7,658.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,321.59 : 18,384.41 = 7,658.18 : x
2. Step 2: Convert to fraction form
   13,321.59/18,384.41 = 7,658.18/x
3. Step 3: Cross multiply
   13,321.59x = 18,384.41 × 7,658.18
4. Step 4: Simplify right side
   13,321.59x = 140,790,990.76
5. Step 5: Solve for x
   x = 140,790,990.76/13,321.59
6. Step 6: Final answer
   x = 10,568.63