Finding the Fourth Proportional to 2,191.89, 3,023.55 and 1,393.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.89 : 3,023.55 = 1,393.77 : x
2. Step 2: Convert to fraction form
   2,191.89/3,023.55 = 1,393.77/x
3. Step 3: Cross multiply
   2,191.89x = 3,023.55 × 1,393.77
4. Step 4: Simplify right side
   2,191.89x = 4,214,133.28
5. Step 5: Solve for x
   x = 4,214,133.28/2,191.89
6. Step 6: Final answer
   x = 1,922.60