Finding the Fourth Proportional to 1,064.83, 1,469.40 and 622.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,064.83 : 1,469.40 = 622.70 : x
2. Step 2: Convert to fraction form
   1,064.83/1,469.40 = 622.70/x
3. Step 3: Cross multiply
   1,064.83x = 1,469.40 × 622.70
4. Step 4: Simplify right side
   1,064.83x = 914,992.27
5. Step 5: Solve for x
   x = 914,992.27/1,064.83
6. Step 6: Final answer
   x = 859.29