Finding the Fourth Proportional to 1,648.39, 2,275.60 and 1,127.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.39 : 2,275.60 = 1,127.15 : x
2. Step 2: Convert to fraction form
   1,648.39/2,275.60 = 1,127.15/x
3. Step 3: Cross multiply
   1,648.39x = 2,275.60 × 1,127.15
4. Step 4: Simplify right side
   1,648.39x = 2,564,936.90
5. Step 5: Solve for x
   x = 2,564,936.90/1,648.39
6. Step 6: Final answer
   x = 1,556.03