Finding the Fourth Proportional to 1,063.29, 1,467.27 and 643.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,063.29 : 1,467.27 = 643.88 : x
2. Step 2: Convert to fraction form
   1,063.29/1,467.27 = 643.88/x
3. Step 3: Cross multiply
   1,063.29x = 1,467.27 × 643.88
4. Step 4: Simplify right side
   1,063.29x = 944,738.47
5. Step 5: Solve for x
   x = 944,738.47/1,063.29
6. Step 6: Final answer
   x = 888.50