Finding the Fourth Proportional to 1,061.28, 1,599.06 and 880.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.28 : 1,599.06 = 880.20 : x
2. Step 2: Convert to fraction form
   1,061.28/1,599.06 = 880.20/x
3. Step 3: Cross multiply
   1,061.28x = 1,599.06 × 880.20
4. Step 4: Simplify right side
   1,061.28x = 1,407,492.61
5. Step 5: Solve for x
   x = 1,407,492.61/1,061.28
6. Step 6: Final answer
   x = 1,326.22