Finding the Fourth Proportional to 1,104.18, 1,522.86 and 772.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,104.18 : 1,522.86 = 772.20 : x
2. Step 2: Convert to fraction form
   1,104.18/1,522.86 = 772.20/x
3. Step 3: Cross multiply
   1,104.18x = 1,522.86 × 772.20
4. Step 4: Simplify right side
   1,104.18x = 1,175,952.49
5. Step 5: Solve for x
   x = 1,175,952.49/1,104.18
6. Step 6: Final answer
   x = 1,065.00