Finding the Fourth Proportional to 1,064.53, 1,468.33 and 644.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,064.53 : 1,468.33 = 644.59 : x
2. Step 2: Convert to fraction form
   1,064.53/1,468.33 = 644.59/x
3. Step 3: Cross multiply
   1,064.53x = 1,468.33 × 644.59
4. Step 4: Simplify right side
   1,064.53x = 946,470.83
5. Step 5: Solve for x
   x = 946,470.83/1,064.53
6. Step 6: Final answer
   x = 889.10