Finding the Fourth Proportional to 7,047.72, 9,726.16 and 3,903.91

Step by Step Solution

1. Step 1: Write the proportion equation
   7,047.72 : 9,726.16 = 3,903.91 : x
2. Step 2: Convert to fraction form
   7,047.72/9,726.16 = 3,903.91/x
3. Step 3: Cross multiply
   7,047.72x = 9,726.16 × 3,903.91
4. Step 4: Simplify right side
   7,047.72x = 37,970,004.65
5. Step 5: Solve for x
   x = 37,970,004.65/7,047.72
6. Step 6: Final answer
   x = 5,387.56