Finding the Fourth Proportional to 1,499.26, 2,068.57 and 939.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.26 : 2,068.57 = 939.55 : x
2. Step 2: Convert to fraction form
   1,499.26/2,068.57 = 939.55/x
3. Step 3: Cross multiply
   1,499.26x = 2,068.57 × 939.55
4. Step 4: Simplify right side
   1,499.26x = 1,943,524.94
5. Step 5: Solve for x
   x = 1,943,524.94/1,499.26
6. Step 6: Final answer
   x = 1,296.32