Finding the Fourth Proportional to 3,935.32, 5,430.72 and 2,256.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,935.32 : 5,430.72 = 2,256.76 : x
2. Step 2: Convert to fraction form
   3,935.32/5,430.72 = 2,256.76/x
3. Step 3: Cross multiply
   3,935.32x = 5,430.72 × 2,256.76
4. Step 4: Simplify right side
   3,935.32x = 12,255,831.67
5. Step 5: Solve for x
   x = 12,255,831.67/3,935.32
6. Step 6: Final answer
   x = 3,114.32