Finding the Fourth Proportional to 2,478.52, 3,718.04 and 939.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,478.52 : 3,718.04 = 939.52 : x
2. Step 2: Convert to fraction form
   2,478.52/3,718.04 = 939.52/x
3. Step 3: Cross multiply
   2,478.52x = 3,718.04 × 939.52
4. Step 4: Simplify right side
   2,478.52x = 3,493,172.94
5. Step 5: Solve for x
   x = 3,493,172.94/2,478.52
6. Step 6: Final answer
   x = 1,409.38