Finding the Fourth Proportional to 1,469.96, 2,028.72 and 910.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,469.96 : 2,028.72 = 910.80 : x
2. Step 2: Convert to fraction form
   1,469.96/2,028.72 = 910.80/x
3. Step 3: Cross multiply
   1,469.96x = 2,028.72 × 910.80
4. Step 4: Simplify right side
   1,469.96x = 1,847,758.18
5. Step 5: Solve for x
   x = 1,847,758.18/1,469.96
6. Step 6: Final answer
   x = 1,257.01