Finding the Fourth Proportional to 1,269.93, 1,752.72 and 939.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,269.93 : 1,752.72 = 939.31 : x
2. Step 2: Convert to fraction form
   1,269.93/1,752.72 = 939.31/x
3. Step 3: Cross multiply
   1,269.93x = 1,752.72 × 939.31
4. Step 4: Simplify right side
   1,269.93x = 1,646,347.42
5. Step 5: Solve for x
   x = 1,646,347.42/1,269.93
6. Step 6: Final answer
   x = 1,296.41