Finding the Fourth Proportional to 1,828.71, 2,748.60 and 1,391.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,828.71 : 2,748.60 = 1,391.31 : x
2. Step 2: Convert to fraction form
   1,828.71/2,748.60 = 1,391.31/x
3. Step 3: Cross multiply
   1,828.71x = 2,748.60 × 1,391.31
4. Step 4: Simplify right side
   1,828.71x = 3,824,154.67
5. Step 5: Solve for x
   x = 3,824,154.67/1,828.71
6. Step 6: Final answer
   x = 2,091.18