Finding the Fourth Proportional to 10,542.42, 15,815.91 and 3,147.47

Step by Step Solution

1. Step 1: Write the proportion equation
   10,542.42 : 15,815.91 = 3,147.47 : x
2. Step 2: Convert to fraction form
   10,542.42/15,815.91 = 3,147.47/x
3. Step 3: Cross multiply
   10,542.42x = 15,815.91 × 3,147.47
4. Step 4: Simplify right side
   10,542.42x = 49,780,023.17
5. Step 5: Solve for x
   x = 49,780,023.17/10,542.42
6. Step 6: Final answer
   x = 4,721.88