Finding the Fourth Proportional to 5,231.32, 7,225.61 and 3,910.88

Step by Step Solution

1. Step 1: Write the proportion equation
   5,231.32 : 7,225.61 = 3,910.88 : x
2. Step 2: Convert to fraction form
   5,231.32/7,225.61 = 3,910.88/x
3. Step 3: Cross multiply
   5,231.32x = 7,225.61 × 3,910.88
4. Step 4: Simplify right side
   5,231.32x = 28,258,492.15
5. Step 5: Solve for x
   x = 28,258,492.15/5,231.32
6. Step 6: Final answer
   x = 5,401.79