Finding the Fourth Proportional to 2,385.83, 3,292.37 and 1,391.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.83 : 3,292.37 = 1,391.15 : x
2. Step 2: Convert to fraction form
   2,385.83/3,292.37 = 1,391.15/x
3. Step 3: Cross multiply
   2,385.83x = 3,292.37 × 1,391.15
4. Step 4: Simplify right side
   2,385.83x = 4,580,181.80
5. Step 5: Solve for x
   x = 4,580,181.80/2,385.83
6. Step 6: Final answer
   x = 1,919.74