Finding the Fourth Proportional to 13,321.67, 18,384.51 and 7,658.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,321.67 : 18,384.51 = 7,658.25 : x
2. Step 2: Convert to fraction form
   13,321.67/18,384.51 = 7,658.25/x
3. Step 3: Cross multiply
   13,321.67x = 18,384.51 × 7,658.25
4. Step 4: Simplify right side
   13,321.67x = 140,793,081.78
5. Step 5: Solve for x
   x = 140,793,081.78/13,321.67
6. Step 6: Final answer
   x = 10,568.73