Finding the Fourth Proportional to 2,558.36, 3,838.52 and 998.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,558.36 : 3,838.52 = 998.50 : x
2. Step 2: Convert to fraction form
   2,558.36/3,838.52 = 998.50/x
3. Step 3: Cross multiply
   2,558.36x = 3,838.52 × 998.50
4. Step 4: Simplify right side
   2,558.36x = 3,832,755.12
5. Step 5: Solve for x
   x = 3,832,755.12/2,558.36
6. Step 6: Final answer
   x = 1,498.13