Finding the Fourth Proportional to 1,452.71, 2,180.89 and 991.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,452.71 : 2,180.89 = 991.62 : x
2. Step 2: Convert to fraction form
   1,452.71/2,180.89 = 991.62/x
3. Step 3: Cross multiply
   1,452.71x = 2,180.89 × 991.62
4. Step 4: Simplify right side
   1,452.71x = 2,162,614.14
5. Step 5: Solve for x
   x = 2,162,614.14/1,452.71
6. Step 6: Final answer
   x = 1,488.68