Finding the Fourth Proportional to 5,086.10, 7,643.73 and 2,490.86

Step by Step Solution

1. Step 1: Write the proportion equation
   5,086.10 : 7,643.73 = 2,490.86 : x
2. Step 2: Convert to fraction form
   5,086.10/7,643.73 = 2,490.86/x
3. Step 3: Cross multiply
   5,086.10x = 7,643.73 × 2,490.86
4. Step 4: Simplify right side
   5,086.10x = 19,039,423.09
5. Step 5: Solve for x
   x = 19,039,423.09/5,086.10
6. Step 6: Final answer
   x = 3,743.43