Finding the Fourth Proportional to 1,101.57, 1,521.72 and 880.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,101.57 : 1,521.72 = 880.26 : x
2. Step 2: Convert to fraction form
   1,101.57/1,521.72 = 880.26/x
3. Step 3: Cross multiply
   1,101.57x = 1,521.72 × 880.26
4. Step 4: Simplify right side
   1,101.57x = 1,339,509.25
5. Step 5: Solve for x
   x = 1,339,509.25/1,101.57
6. Step 6: Final answer
   x = 1,216.00