Finding the Fourth Proportional to 2,391.83, 3,300.85 and 1,397.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.83 : 3,300.85 = 1,397.05 : x
2. Step 2: Convert to fraction form
   2,391.83/3,300.85 = 1,397.05/x
3. Step 3: Cross multiply
   2,391.83x = 3,300.85 × 1,397.05
4. Step 4: Simplify right side
   2,391.83x = 4,611,445.99
5. Step 5: Solve for x
   x = 4,611,445.99/2,391.83
6. Step 6: Final answer
   x = 1,928.00