Finding the Fourth Proportional to 10,386.72, 15,582.51 and 4,147.14

Step by Step Solution

1. Step 1: Write the proportion equation
   10,386.72 : 15,582.51 = 4,147.14 : x
2. Step 2: Convert to fraction form
   10,386.72/15,582.51 = 4,147.14/x
3. Step 3: Cross multiply
   10,386.72x = 15,582.51 × 4,147.14
4. Step 4: Simplify right side
   10,386.72x = 64,622,850.52
5. Step 5: Solve for x
   x = 64,622,850.52/10,386.72
6. Step 6: Final answer
   x = 6,221.68