Finding the Fourth Proportional to 1,600.72, 2,209.18 and 902.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,600.72 : 2,209.18 = 902.22 : x
2. Step 2: Convert to fraction form
   1,600.72/2,209.18 = 902.22/x
3. Step 3: Cross multiply
   1,600.72x = 2,209.18 × 902.22
4. Step 4: Simplify right side
   1,600.72x = 1,993,166.38
5. Step 5: Solve for x
   x = 1,993,166.38/1,600.72
6. Step 6: Final answer
   x = 1,245.17