Finding the Fourth Proportional to 1,064.84, 1,469.40 and 622.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,064.84 : 1,469.40 = 622.76 : x
2. Step 2: Convert to fraction form
   1,064.84/1,469.40 = 622.76/x
3. Step 3: Cross multiply
   1,064.84x = 1,469.40 × 622.76
4. Step 4: Simplify right side
   1,064.84x = 915,083.54
5. Step 5: Solve for x
   x = 915,083.54/1,064.84
6. Step 6: Final answer
   x = 859.36