Finding the Fourth Proportional to 1,650.85, 2,278.17 and 904.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,650.85 : 2,278.17 = 904.86 : x
2. Step 2: Convert to fraction form
   1,650.85/2,278.17 = 904.86/x
3. Step 3: Cross multiply
   1,650.85x = 2,278.17 × 904.86
4. Step 4: Simplify right side
   1,650.85x = 2,061,424.91
5. Step 5: Solve for x
   x = 2,061,424.91/1,650.85
6. Step 6: Final answer
   x = 1,248.71