Finding the Fourth Proportional to 3,898.17, 5,377.73 and 2,406.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,898.17 : 5,377.73 = 2,406.15 : x
2. Step 2: Convert to fraction form
   3,898.17/5,377.73 = 2,406.15/x
3. Step 3: Cross multiply
   3,898.17x = 5,377.73 × 2,406.15
4. Step 4: Simplify right side
   3,898.17x = 12,939,613.01
5. Step 5: Solve for x
   x = 12,939,613.01/3,898.17
6. Step 6: Final answer
   x = 3,319.41