Finding the Fourth Proportional to 5,429.64, 8,158.13 and 3,456.18

Step by Step Solution

1. Step 1: Write the proportion equation
   5,429.64 : 8,158.13 = 3,456.18 : x
2. Step 2: Convert to fraction form
   5,429.64/8,158.13 = 3,456.18/x
3. Step 3: Cross multiply
   5,429.64x = 8,158.13 × 3,456.18
4. Step 4: Simplify right side
   5,429.64x = 28,195,907.67
5. Step 5: Solve for x
   x = 28,195,907.67/5,429.64
6. Step 6: Final answer
   x = 5,192.96