Finding the Fourth Proportional to 1,997.91, 2,758.86 and 1,253.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,997.91 : 2,758.86 = 1,253.15 : x
2. Step 2: Convert to fraction form
   1,997.91/2,758.86 = 1,253.15/x
3. Step 3: Cross multiply
   1,997.91x = 2,758.86 × 1,253.15
4. Step 4: Simplify right side
   1,997.91x = 3,457,265.41
5. Step 5: Solve for x
   x = 3,457,265.41/1,997.91
6. Step 6: Final answer
   x = 1,730.44