Finding the Fourth Proportional to 1,548.45, 2,321.55 and 726.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,548.45 : 2,321.55 = 726.30 : x
2. Step 2: Convert to fraction form
   1,548.45/2,321.55 = 726.30/x
3. Step 3: Cross multiply
   1,548.45x = 2,321.55 × 726.30
4. Step 4: Simplify right side
   1,548.45x = 1,686,141.77
5. Step 5: Solve for x
   x = 1,686,141.77/1,548.45
6. Step 6: Final answer
   x = 1,088.92