Finding the Fourth Proportional to 1,565.67, 2,160.28 and 936.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,565.67 : 2,160.28 = 936.10 : x
2. Step 2: Convert to fraction form
   1,565.67/2,160.28 = 936.10/x
3. Step 3: Cross multiply
   1,565.67x = 2,160.28 × 936.10
4. Step 4: Simplify right side
   1,565.67x = 2,022,224.56
5. Step 5: Solve for x
   x = 2,022,224.56/1,565.67
6. Step 6: Final answer
   x = 1,291.60