Finding the Fourth Proportional to 2,139.48, 3,191.94 and 1,827.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.48 : 3,191.94 = 1,827.72 : x
2. Step 2: Convert to fraction form
   2,139.48/3,191.94 = 1,827.72/x
3. Step 3: Cross multiply
   2,139.48x = 3,191.94 × 1,827.72
4. Step 4: Simplify right side
   2,139.48x = 5,833,972.58
5. Step 5: Solve for x
   x = 5,833,972.58/2,139.48
6. Step 6: Final answer
   x = 2,726.82