Finding the Fourth Proportional to 1,064.60, 1,469.15 and 622.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,064.60 : 1,469.15 = 622.59 : x
2. Step 2: Convert to fraction form
   1,064.60/1,469.15 = 622.59/x
3. Step 3: Cross multiply
   1,064.60x = 1,469.15 × 622.59
4. Step 4: Simplify right side
   1,064.60x = 914,678.10
5. Step 5: Solve for x
   x = 914,678.10/1,064.60
6. Step 6: Final answer
   x = 859.18