Finding the Fourth Proportional to 10,613.55, 15,917.69 and 4,371.87

Step by Step Solution

1. Step 1: Write the proportion equation
   10,613.55 : 15,917.69 = 4,371.87 : x
2. Step 2: Convert to fraction form
   10,613.55/15,917.69 = 4,371.87/x
3. Step 3: Cross multiply
   10,613.55x = 15,917.69 × 4,371.87
4. Step 4: Simplify right side
   10,613.55x = 69,590,049.52
5. Step 5: Solve for x
   x = 69,590,049.52/10,613.55
6. Step 6: Final answer
   x = 6,556.72