Finding the Fourth Proportional to 2,091.76, 2,886.73 and 1,252.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.76 : 2,886.73 = 1,252.31 : x
2. Step 2: Convert to fraction form
   2,091.76/2,886.73 = 1,252.31/x
3. Step 3: Cross multiply
   2,091.76x = 2,886.73 × 1,252.31
4. Step 4: Simplify right side
   2,091.76x = 3,615,080.85
5. Step 5: Solve for x
   x = 3,615,080.85/2,091.76
6. Step 6: Final answer
   x = 1,728.25