Finding the Fourth Proportional to 1,565.98, 2,160.56 and 902.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,565.98 : 2,160.56 = 902.74 : x
2. Step 2: Convert to fraction form
   1,565.98/2,160.56 = 902.74/x
3. Step 3: Cross multiply
   1,565.98x = 2,160.56 × 902.74
4. Step 4: Simplify right side
   1,565.98x = 1,950,428.89
5. Step 5: Solve for x
   x = 1,950,428.89/1,565.98
6. Step 6: Final answer
   x = 1,245.50