Finding the Fourth Proportional to 2,478.73, 3,718.05 and 998.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,478.73 : 3,718.05 = 998.59 : x
2. Step 2: Convert to fraction form
   2,478.73/3,718.05 = 998.59/x
3. Step 3: Cross multiply
   2,478.73x = 3,718.05 × 998.59
4. Step 4: Simplify right side
   2,478.73x = 3,712,807.55
5. Step 5: Solve for x
   x = 3,712,807.55/2,478.73
6. Step 6: Final answer
   x = 1,497.87