Finding the Fourth Proportional to 2,192.56, 3,025.76 and 1,248.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,192.56 : 3,025.76 = 1,248.40 : x
2. Step 2: Convert to fraction form
   2,192.56/3,025.76 = 1,248.40/x
3. Step 3: Cross multiply
   2,192.56x = 3,025.76 × 1,248.40
4. Step 4: Simplify right side
   2,192.56x = 3,777,358.78
5. Step 5: Solve for x
   x = 3,777,358.78/2,192.56
6. Step 6: Final answer
   x = 1,722.81