Finding the Fourth Proportional to 8,488.91, 12,740.66 and 3,298.43

Step by Step Solution

1. Step 1: Write the proportion equation
   8,488.91 : 12,740.66 = 3,298.43 : x
2. Step 2: Convert to fraction form
   8,488.91/12,740.66 = 3,298.43/x
3. Step 3: Cross multiply
   8,488.91x = 12,740.66 × 3,298.43
4. Step 4: Simplify right side
   8,488.91x = 42,024,175.16
5. Step 5: Solve for x
   x = 42,024,175.16/8,488.91
6. Step 6: Final answer
   x = 4,950.48