Finding the Fourth Proportional to 1,565.61, 2,160.05 and 902.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,565.61 : 2,160.05 = 902.37 : x
2. Step 2: Convert to fraction form
   1,565.61/2,160.05 = 902.37/x
3. Step 3: Cross multiply
   1,565.61x = 2,160.05 × 902.37
4. Step 4: Simplify right side
   1,565.61x = 1,949,151.71
5. Step 5: Solve for x
   x = 1,949,151.71/1,565.61
6. Step 6: Final answer
   x = 1,244.98