Finding the Fourth Proportional to 1,565.38, 2,160.16 and 936.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,565.38 : 2,160.16 = 936.25 : x
2. Step 2: Convert to fraction form
   1,565.38/2,160.16 = 936.25/x
3. Step 3: Cross multiply
   1,565.38x = 2,160.16 × 936.25
4. Step 4: Simplify right side
   1,565.38x = 2,022,449.80
5. Step 5: Solve for x
   x = 2,022,449.80/1,565.38
6. Step 6: Final answer
   x = 1,291.99