Finding the Fourth Proportional to 2,119.74, 3,179.49 and 886.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,119.74 : 3,179.49 = 886.50 : x
2. Step 2: Convert to fraction form
   2,119.74/3,179.49 = 886.50/x
3. Step 3: Cross multiply
   2,119.74x = 3,179.49 × 886.50
4. Step 4: Simplify right side
   2,119.74x = 2,818,617.89
5. Step 5: Solve for x
   x = 2,818,617.89/2,119.74
6. Step 6: Final answer
   x = 1,329.70