Finding the Fourth Proportional to 1,610.98, 2,223.31 and 902.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610.98 : 2,223.31 = 902.94 : x
2. Step 2: Convert to fraction form
   1,610.98/2,223.31 = 902.94/x
3. Step 3: Cross multiply
   1,610.98x = 2,223.31 × 902.94
4. Step 4: Simplify right side
   1,610.98x = 2,007,513.80
5. Step 5: Solve for x
   x = 2,007,513.80/1,610.98
6. Step 6: Final answer
   x = 1,246.15