Finding the Fourth Proportional to 2,098.86, 3,148.27 and 638.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,098.86 : 3,148.27 = 638.01 : x
2. Step 2: Convert to fraction form
   2,098.86/3,148.27 = 638.01/x
3. Step 3: Cross multiply
   2,098.86x = 3,148.27 × 638.01
4. Step 4: Simplify right side
   2,098.86x = 2,008,620.52
5. Step 5: Solve for x
   x = 2,008,620.52/2,098.86
6. Step 6: Final answer
   x = 957.01