Finding the Fourth Proportional to 13,319.91, 18,384.17 and 7,658.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,319.91 : 18,384.17 = 7,658.62 : x
2. Step 2: Convert to fraction form
   13,319.91/18,384.17 = 7,658.62/x
3. Step 3: Cross multiply
   13,319.91x = 18,384.17 × 7,658.62
4. Step 4: Simplify right side
   13,319.91x = 140,797,287.79
5. Step 5: Solve for x
   x = 140,797,287.79/13,319.91
6. Step 6: Final answer
   x = 10,570.44