Finding the Fourth Proportional to 1,083.60, 1,494.56 and 690.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,083.60 : 1,494.56 = 690.75 : x
2. Step 2: Convert to fraction form
   1,083.60/1,494.56 = 690.75/x
3. Step 3: Cross multiply
   1,083.60x = 1,494.56 × 690.75
4. Step 4: Simplify right side
   1,083.60x = 1,032,367.32
5. Step 5: Solve for x
   x = 1,032,367.32/1,083.60
6. Step 6: Final answer
   x = 952.72