Finding the Fourth Proportional to 1,565.56, 2,160.42 and 902.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,565.56 : 2,160.42 = 902.32 : x
2. Step 2: Convert to fraction form
   1,565.56/2,160.42 = 902.32/x
3. Step 3: Cross multiply
   1,565.56x = 2,160.42 × 902.32
4. Step 4: Simplify right side
   1,565.56x = 1,949,390.17
5. Step 5: Solve for x
   x = 1,949,390.17/1,565.56
6. Step 6: Final answer
   x = 1,245.17