Finding the Fourth Proportional to 1,114.55, 1,669.23 and 881.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,114.55 : 1,669.23 = 881.90 : x
2. Step 2: Convert to fraction form
   1,114.55/1,669.23 = 881.90/x
3. Step 3: Cross multiply
   1,114.55x = 1,669.23 × 881.90
4. Step 4: Simplify right side
   1,114.55x = 1,472,085.59
5. Step 5: Solve for x
   x = 1,472,085.59/1,114.55
6. Step 6: Final answer
   x = 1,320.80