Finding the Fourth Proportional to 1,162.41, 1,604.10 and 638.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.41 : 1,604.10 = 638.43 : x
2. Step 2: Convert to fraction form
   1,162.41/1,604.10 = 638.43/x
3. Step 3: Cross multiply
   1,162.41x = 1,604.10 × 638.43
4. Step 4: Simplify right side
   1,162.41x = 1,024,105.56
5. Step 5: Solve for x
   x = 1,024,105.56/1,162.41
6. Step 6: Final answer
   x = 881.02