Finding the Fourth Proportional to 12,382.34, 18,578.25 and 7,455.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,382.34 : 18,578.25 = 7,455.50 : x
2. Step 2: Convert to fraction form
   12,382.34/18,578.25 = 7,455.50/x
3. Step 3: Cross multiply
   12,382.34x = 18,578.25 × 7,455.50
4. Step 4: Simplify right side
   12,382.34x = 138,510,142.88
5. Step 5: Solve for x
   x = 138,510,142.88/12,382.34
6. Step 6: Final answer
   x = 11,186.10