Finding the Fourth Proportional to 2,385.98, 3,292.38 and 1,391.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.98 : 3,292.38 = 1,391.06 : x
2. Step 2: Convert to fraction form
   2,385.98/3,292.38 = 1,391.06/x
3. Step 3: Cross multiply
   2,385.98x = 3,292.38 × 1,391.06
4. Step 4: Simplify right side
   2,385.98x = 4,579,881.66
5. Step 5: Solve for x
   x = 4,579,881.66/2,385.98
6. Step 6: Final answer
   x = 1,919.50