Finding the Fourth Proportional to 1,131.20, 1,695.12 and 669.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.20 : 1,695.12 = 669.08 : x
2. Step 2: Convert to fraction form
   1,131.20/1,695.12 = 669.08/x
3. Step 3: Cross multiply
   1,131.20x = 1,695.12 × 669.08
4. Step 4: Simplify right side
   1,131.20x = 1,134,170.89
5. Step 5: Solve for x
   x = 1,134,170.89/1,131.20
6. Step 6: Final answer
   x = 1,002.63