Finding the Fourth Proportional to 5,726.32, 7,843.09 and 5,390.08

Step by Step Solution

1. Step 1: Write the proportion equation
   5,726.32 : 7,843.09 = 5,390.08 : x
2. Step 2: Convert to fraction form
   5,726.32/7,843.09 = 5,390.08/x
3. Step 3: Cross multiply
   5,726.32x = 7,843.09 × 5,390.08
4. Step 4: Simplify right side
   5,726.32x = 42,274,882.55
5. Step 5: Solve for x
   x = 42,274,882.55/5,726.32
6. Step 6: Final answer
   x = 7,382.56