Finding the Fourth Proportional to 2,891.82, 3,990.71 and 1,565.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,891.82 : 3,990.71 = 1,565.52 : x
2. Step 2: Convert to fraction form
   2,891.82/3,990.71 = 1,565.52/x
3. Step 3: Cross multiply
   2,891.82x = 3,990.71 × 1,565.52
4. Step 4: Simplify right side
   2,891.82x = 6,247,536.32
5. Step 5: Solve for x
   x = 6,247,536.32/2,891.82
6. Step 6: Final answer
   x = 2,160.42