Finding the Fourth Proportional to 9,861.61, 14,747.49 and 7,364.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,861.61 : 14,747.49 = 7,364.55 : x
2. Step 2: Convert to fraction form
   9,861.61/14,747.49 = 7,364.55/x
3. Step 3: Cross multiply
   9,861.61x = 14,747.49 × 7,364.55
4. Step 4: Simplify right side
   9,861.61x = 108,608,627.48
5. Step 5: Solve for x
   x = 108,608,627.48/9,861.61
6. Step 6: Final answer
   x = 11,013.28