Finding the Fourth Proportional to 1,469.88, 2,205.56 and 854.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,469.88 : 2,205.56 = 854.15 : x
2. Step 2: Convert to fraction form
   1,469.88/2,205.56 = 854.15/x
3. Step 3: Cross multiply
   1,469.88x = 2,205.56 × 854.15
4. Step 4: Simplify right side
   1,469.88x = 1,883,870.18
5. Step 5: Solve for x
   x = 1,883,870.18/1,469.88
6. Step 6: Final answer
   x = 1,281.65