Finding the Fourth Proportional to 1,162.32, 1,604.10 and 638.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.32 : 1,604.10 = 638.46 : x
2. Step 2: Convert to fraction form
   1,162.32/1,604.10 = 638.46/x
3. Step 3: Cross multiply
   1,162.32x = 1,604.10 × 638.46
4. Step 4: Simplify right side
   1,162.32x = 1,024,153.69
5. Step 5: Solve for x
   x = 1,024,153.69/1,162.32
6. Step 6: Final answer
   x = 881.13