Finding the Fourth Proportional to 12,553.50, 18,834.21 and 7,561.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,553.50 : 18,834.21 = 7,561.47 : x
2. Step 2: Convert to fraction form
   12,553.50/18,834.21 = 7,561.47/x
3. Step 3: Cross multiply
   12,553.50x = 18,834.21 × 7,561.47
4. Step 4: Simplify right side
   12,553.50x = 142,414,313.89
5. Step 5: Solve for x
   x = 142,414,313.89/12,553.50
6. Step 6: Final answer
   x = 11,344.59