Finding the Fourth Proportional to 3,131.06, 4,696.52 and 939.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.06 : 4,696.52 = 939.69 : x
2. Step 2: Convert to fraction form
   3,131.06/4,696.52 = 939.69/x
3. Step 3: Cross multiply
   3,131.06x = 4,696.52 × 939.69
4. Step 4: Simplify right side
   3,131.06x = 4,413,268.18
5. Step 5: Solve for x
   x = 4,413,268.18/3,131.06
6. Step 6: Final answer
   x = 1,409.51