Finding the Fourth Proportional to 1,053.98, 1,454.56 and 699.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.98 : 1,454.56 = 699.28 : x
2. Step 2: Convert to fraction form
   1,053.98/1,454.56 = 699.28/x
3. Step 3: Cross multiply
   1,053.98x = 1,454.56 × 699.28
4. Step 4: Simplify right side
   1,053.98x = 1,017,144.72
5. Step 5: Solve for x
   x = 1,017,144.72/1,053.98
6. Step 6: Final answer
   x = 965.05