Finding the Fourth Proportional to 1,064.65, 1,469.01 and 622.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,064.65 : 1,469.01 = 622.57 : x
2. Step 2: Convert to fraction form
   1,064.65/1,469.01 = 622.57/x
3. Step 3: Cross multiply
   1,064.65x = 1,469.01 × 622.57
4. Step 4: Simplify right side
   1,064.65x = 914,561.56
5. Step 5: Solve for x
   x = 914,561.56/1,064.65
6. Step 6: Final answer
   x = 859.03