Finding the Fourth Proportional to 1,648.92, 2,474.56 and 1,238.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.92 : 2,474.56 = 1,238.84 : x
2. Step 2: Convert to fraction form
   1,648.92/2,474.56 = 1,238.84/x
3. Step 3: Cross multiply
   1,648.92x = 2,474.56 × 1,238.84
4. Step 4: Simplify right side
   1,648.92x = 3,065,583.91
5. Step 5: Solve for x
   x = 3,065,583.91/1,648.92
6. Step 6: Final answer
   x = 1,859.15