Finding the Fourth Proportional to 3,884.91, 5,364.72 and 2,490.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,884.91 : 5,364.72 = 2,490.09 : x
2. Step 2: Convert to fraction form
   3,884.91/5,364.72 = 2,490.09/x
3. Step 3: Cross multiply
   3,884.91x = 5,364.72 × 2,490.09
4. Step 4: Simplify right side
   3,884.91x = 13,358,635.62
5. Step 5: Solve for x
   x = 13,358,635.62/3,884.91
6. Step 6: Final answer
   x = 3,438.60