Finding the Fourth Proportional to 2,499.23, 3,749.25 and 939.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.23 : 3,749.25 = 939.79 : x
2. Step 2: Convert to fraction form
   2,499.23/3,749.25 = 939.79/x
3. Step 3: Cross multiply
   2,499.23x = 3,749.25 × 939.79
4. Step 4: Simplify right side
   2,499.23x = 3,523,507.66
5. Step 5: Solve for x
   x = 3,523,507.66/2,499.23
6. Step 6: Final answer
   x = 1,409.84