Finding the Fourth Proportional to 1,162.34, 1,604.05 and 638.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.34 : 1,604.05 = 638.37 : x
2. Step 2: Convert to fraction form
   1,162.34/1,604.05 = 638.37/x
3. Step 3: Cross multiply
   1,162.34x = 1,604.05 × 638.37
4. Step 4: Simplify right side
   1,162.34x = 1,023,977.40
5. Step 5: Solve for x
   x = 1,023,977.40/1,162.34
6. Step 6: Final answer
   x = 880.96