Finding the Fourth Proportional to 1,648.94, 2,275.56 and 902.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.94 : 2,275.56 = 902.88 : x
2. Step 2: Convert to fraction form
   1,648.94/2,275.56 = 902.88/x
3. Step 3: Cross multiply
   1,648.94x = 2,275.56 × 902.88
4. Step 4: Simplify right side
   1,648.94x = 2,054,553.10
5. Step 5: Solve for x
   x = 2,054,553.10/1,648.94
6. Step 6: Final answer
   x = 1,245.99