Finding the Fourth Proportional to 1,065.07, 1,469.89 and 622.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.07 : 1,469.89 = 622.88 : x
2. Step 2: Convert to fraction form
   1,065.07/1,469.89 = 622.88/x
3. Step 3: Cross multiply
   1,065.07x = 1,469.89 × 622.88
4. Step 4: Simplify right side
   1,065.07x = 915,565.08
5. Step 5: Solve for x
   x = 915,565.08/1,065.07
6. Step 6: Final answer
   x = 859.63