Finding the Fourth Proportional to 1,063.92, 1,468.16 and 644.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,063.92 : 1,468.16 = 644.52 : x
2. Step 2: Convert to fraction form
   1,063.92/1,468.16 = 644.52/x
3. Step 3: Cross multiply
   1,063.92x = 1,468.16 × 644.52
4. Step 4: Simplify right side
   1,063.92x = 946,258.48
5. Step 5: Solve for x
   x = 946,258.48/1,063.92
6. Step 6: Final answer
   x = 889.41