Finding the Fourth Proportional to 1,549.47, 2,138.27 and 911.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,549.47 : 2,138.27 = 911.25 : x
2. Step 2: Convert to fraction form
   1,549.47/2,138.27 = 911.25/x
3. Step 3: Cross multiply
   1,549.47x = 2,138.27 × 911.25
4. Step 4: Simplify right side
   1,549.47x = 1,948,493.70
5. Step 5: Solve for x
   x = 1,948,493.70/1,549.47
6. Step 6: Final answer
   x = 1,257.52