Finding the Fourth Proportional to 1,648.82, 2,275.43 and 902.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.82 : 2,275.43 = 902.81 : x
2. Step 2: Convert to fraction form
   1,648.82/2,275.43 = 902.81/x
3. Step 3: Cross multiply
   1,648.82x = 2,275.43 × 902.81
4. Step 4: Simplify right side
   1,648.82x = 2,054,265.07
5. Step 5: Solve for x
   x = 2,054,265.07/1,648.82
6. Step 6: Final answer
   x = 1,245.90