Finding the Fourth Proportional to 13,325.69, 18,387.50 and 7,660.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,325.69 : 18,387.50 = 7,660.69 : x
2. Step 2: Convert to fraction form
   13,325.69/18,387.50 = 7,660.69/x
3. Step 3: Cross multiply
   13,325.69x = 18,387.50 × 7,660.69
4. Step 4: Simplify right side
   13,325.69x = 140,860,853.10
5. Step 5: Solve for x
   x = 140,860,853.10/13,325.69
6. Step 6: Final answer
   x = 10,570.62