Finding the Fourth Proportional to 10,434.32, 15,640.56 and 3,856.32

Step by Step Solution

1. Step 1: Write the proportion equation
   10,434.32 : 15,640.56 = 3,856.32 : x
2. Step 2: Convert to fraction form
   10,434.32/15,640.56 = 3,856.32/x
3. Step 3: Cross multiply
   10,434.32x = 15,640.56 × 3,856.32
4. Step 4: Simplify right side
   10,434.32x = 60,315,004.34
5. Step 5: Solve for x
   x = 60,315,004.34/10,434.32
6. Step 6: Final answer
   x = 5,780.44