Finding the Fourth Proportional to 2,458.10, 3,688.05 and 998.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,458.10 : 3,688.05 = 998.30 : x
2. Step 2: Convert to fraction form
   2,458.10/3,688.05 = 998.30/x
3. Step 3: Cross multiply
   2,458.10x = 3,688.05 × 998.30
4. Step 4: Simplify right side
   2,458.10x = 3,681,780.32
5. Step 5: Solve for x
   x = 3,681,780.32/2,458.10
6. Step 6: Final answer
   x = 1,497.82