Finding the Fourth Proportional to 1,591.56, 2,388.06 and 726.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.56 : 2,388.06 = 726.12 : x
2. Step 2: Convert to fraction form
   1,591.56/2,388.06 = 726.12/x
3. Step 3: Cross multiply
   1,591.56x = 2,388.06 × 726.12
4. Step 4: Simplify right side
   1,591.56x = 1,734,018.13
5. Step 5: Solve for x
   x = 1,734,018.13/1,591.56
6. Step 6: Final answer
   x = 1,089.51