Finding the Fourth Proportional to 1,648.37, 2,274.69 and 902.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.37 : 2,274.69 = 902.31 : x
2. Step 2: Convert to fraction form
   1,648.37/2,274.69 = 902.31/x
3. Step 3: Cross multiply
   1,648.37x = 2,274.69 × 902.31
4. Step 4: Simplify right side
   1,648.37x = 2,052,475.53
5. Step 5: Solve for x
   x = 2,052,475.53/1,648.37
6. Step 6: Final answer
   x = 1,245.16