Finding the Fourth Proportional to 10,613.60, 14,636.98 and 7,215.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,613.60 : 14,636.98 = 7,215.72 : x
2. Step 2: Convert to fraction form
   10,613.60/14,636.98 = 7,215.72/x
3. Step 3: Cross multiply
   10,613.60x = 14,636.98 × 7,215.72
4. Step 4: Simplify right side
   10,613.60x = 105,616,349.33
5. Step 5: Solve for x
   x = 105,616,349.33/10,613.60
6. Step 6: Final answer
   x = 9,951.04