Finding the Fourth Proportional to 1,565.72, 2,351.27 and 1,390.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,565.72 : 2,351.27 = 1,390.42 : x
2. Step 2: Convert to fraction form
   1,565.72/2,351.27 = 1,390.42/x
3. Step 3: Cross multiply
   1,565.72x = 2,351.27 × 1,390.42
4. Step 4: Simplify right side
   1,565.72x = 3,269,252.83
5. Step 5: Solve for x
   x = 3,269,252.83/1,565.72
6. Step 6: Final answer
   x = 2,088.02