Finding the Fourth Proportional to 1,648.76, 2,275.26 and 902.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.76 : 2,275.26 = 902.72 : x
2. Step 2: Convert to fraction form
   1,648.76/2,275.26 = 902.72/x
3. Step 3: Cross multiply
   1,648.76x = 2,275.26 × 902.72
4. Step 4: Simplify right side
   1,648.76x = 2,053,911.33
5. Step 5: Solve for x
   x = 2,053,911.33/1,648.76
6. Step 6: Final answer
   x = 1,245.73