Finding the Fourth Proportional to 1,498.83, 2,068.65 and 939.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,498.83 : 2,068.65 = 939.78 : x
2. Step 2: Convert to fraction form
   1,498.83/2,068.65 = 939.78/x
3. Step 3: Cross multiply
   1,498.83x = 2,068.65 × 939.78
4. Step 4: Simplify right side
   1,498.83x = 1,944,065.55
5. Step 5: Solve for x
   x = 1,944,065.55/1,498.83
6. Step 6: Final answer
   x = 1,297.06