Finding the Fourth Proportional to 2,499.49, 3,749.64 and 939.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.49 : 3,749.64 = 939.63 : x
2. Step 2: Convert to fraction form
   2,499.49/3,749.64 = 939.63/x
3. Step 3: Cross multiply
   2,499.49x = 3,749.64 × 939.63
4. Step 4: Simplify right side
   2,499.49x = 3,523,274.23
5. Step 5: Solve for x
   x = 3,523,274.23/2,499.49
6. Step 6: Final answer
   x = 1,409.60