Finding the Fourth Proportional to 1,549.58, 2,322.32 and 726.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,549.58 : 2,322.32 = 726.72 : x
2. Step 2: Convert to fraction form
   1,549.58/2,322.32 = 726.72/x
3. Step 3: Cross multiply
   1,549.58x = 2,322.32 × 726.72
4. Step 4: Simplify right side
   1,549.58x = 1,687,681.20
5. Step 5: Solve for x
   x = 1,687,681.20/1,549.58
6. Step 6: Final answer
   x = 1,089.12