Finding the Fourth Proportional to 2,256.15, 3,113.51 and 1,261.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,256.15 : 3,113.51 = 1,261.47 : x
2. Step 2: Convert to fraction form
   2,256.15/3,113.51 = 1,261.47/x
3. Step 3: Cross multiply
   2,256.15x = 3,113.51 × 1,261.47
4. Step 4: Simplify right side
   2,256.15x = 3,927,593.15
5. Step 5: Solve for x
   x = 3,927,593.15/2,256.15
6. Step 6: Final answer
   x = 1,740.84