Finding the Fourth Proportional to 1,672.49, 2,306.88 and 1,147.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.49 : 2,306.88 = 1,147.61 : x
2. Step 2: Convert to fraction form
   1,672.49/2,306.88 = 1,147.61/x
3. Step 3: Cross multiply
   1,672.49x = 2,306.88 × 1,147.61
4. Step 4: Simplify right side
   1,672.49x = 2,647,387.02
5. Step 5: Solve for x
   x = 2,647,387.02/1,672.49
6. Step 6: Final answer
   x = 1,582.91