Finding the Fourth Proportional to 1,064.50, 1,469.02 and 622.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,064.50 : 1,469.02 = 622.31 : x
2. Step 2: Convert to fraction form
   1,064.50/1,469.02 = 622.31/x
3. Step 3: Cross multiply
   1,064.50x = 1,469.02 × 622.31
4. Step 4: Simplify right side
   1,064.50x = 914,187.95
5. Step 5: Solve for x
   x = 914,187.95/1,064.50
6. Step 6: Final answer
   x = 858.80