Finding the Fourth Proportional to 2,665.91, 3,679.64 and 1,590.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.91 : 3,679.64 = 1,590.35 : x
2. Step 2: Convert to fraction form
   2,665.91/3,679.64 = 1,590.35/x
3. Step 3: Cross multiply
   2,665.91x = 3,679.64 × 1,590.35
4. Step 4: Simplify right side
   2,665.91x = 5,851,895.09
5. Step 5: Solve for x
   x = 5,851,895.09/2,665.91
6. Step 6: Final answer
   x = 2,195.08