Finding the Fourth Proportional to 5,429.36, 7,492.56 and 3,191.28

Step by Step Solution

1. Step 1: Write the proportion equation
   5,429.36 : 7,492.56 = 3,191.28 : x
2. Step 2: Convert to fraction form
   5,429.36/7,492.56 = 3,191.28/x
3. Step 3: Cross multiply
   5,429.36x = 7,492.56 × 3,191.28
4. Step 4: Simplify right side
   5,429.36x = 23,910,856.88
5. Step 5: Solve for x
   x = 23,910,856.88/5,429.36
6. Step 6: Final answer
   x = 4,403.99