Finding the Fourth Proportional to 7,048.13, 9,726.72 and 3,904.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,048.13 : 9,726.72 = 3,904.31 : x
2. Step 2: Convert to fraction form
   7,048.13/9,726.72 = 3,904.31/x
3. Step 3: Cross multiply
   7,048.13x = 9,726.72 × 3,904.31
4. Step 4: Simplify right side
   7,048.13x = 37,976,139.84
5. Step 5: Solve for x
   x = 37,976,139.84/7,048.13
6. Step 6: Final answer
   x = 5,388.12