Finding the Fourth Proportional to 1,499.38, 2,068.60 and 939.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.38 : 2,068.60 = 939.87 : x
2. Step 2: Convert to fraction form
   1,499.38/2,068.60 = 939.87/x
3. Step 3: Cross multiply
   1,499.38x = 2,068.60 × 939.87
4. Step 4: Simplify right side
   1,499.38x = 1,944,220.49
5. Step 5: Solve for x
   x = 1,944,220.49/1,499.38
6. Step 6: Final answer
   x = 1,296.68