Finding the Fourth Proportional to 2,385.86, 3,293.37 and 1,391.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.86 : 3,293.37 = 1,391.45 : x
2. Step 2: Convert to fraction form
   2,385.86/3,293.37 = 1,391.45/x
3. Step 3: Cross multiply
   2,385.86x = 3,293.37 × 1,391.45
4. Step 4: Simplify right side
   2,385.86x = 4,582,543.22
5. Step 5: Solve for x
   x = 4,582,543.22/2,385.86
6. Step 6: Final answer
   x = 1,920.71