Finding the Fourth Proportional to 3,763.40, 5,199.39 and 2,590.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,763.40 : 5,199.39 = 2,590.72 : x
2. Step 2: Convert to fraction form
   3,763.40/5,199.39 = 2,590.72/x
3. Step 3: Cross multiply
   3,763.40x = 5,199.39 × 2,590.72
4. Step 4: Simplify right side
   3,763.40x = 13,470,150.66
5. Step 5: Solve for x
   x = 13,470,150.66/3,763.40
6. Step 6: Final answer
   x = 3,579.26