Finding the Fourth Proportional to 1,661.72, 2,294.52 and 1,131.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,661.72 : 2,294.52 = 1,131.72 : x
2. Step 2: Convert to fraction form
   1,661.72/2,294.52 = 1,131.72/x
3. Step 3: Cross multiply
   1,661.72x = 2,294.52 × 1,131.72
4. Step 4: Simplify right side
   1,661.72x = 2,596,757.42
5. Step 5: Solve for x
   x = 2,596,757.42/1,661.72
6. Step 6: Final answer
   x = 1,562.69