Finding the Fourth Proportional to 2,392.76, 3,300.90 and 1,398.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,392.76 : 3,300.90 = 1,398.08 : x
2. Step 2: Convert to fraction form
   2,392.76/3,300.90 = 1,398.08/x
3. Step 3: Cross multiply
   2,392.76x = 3,300.90 × 1,398.08
4. Step 4: Simplify right side
   2,392.76x = 4,614,922.27
5. Step 5: Solve for x
   x = 4,614,922.27/2,392.76
6. Step 6: Final answer
   x = 1,928.70