Finding the Fourth Proportional to 1,162.41, 1,604.12 and 638.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.41 : 1,604.12 = 638.47 : x
2. Step 2: Convert to fraction form
   1,162.41/1,604.12 = 638.47/x
3. Step 3: Cross multiply
   1,162.41x = 1,604.12 × 638.47
4. Step 4: Simplify right side
   1,162.41x = 1,024,184.90
5. Step 5: Solve for x
   x = 1,024,184.90/1,162.41
6. Step 6: Final answer
   x = 881.09