Finding the Fourth Proportional to 1,622.78, 2,436.55 and 1,069.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,622.78 : 2,436.55 = 1,069.14 : x
2. Step 2: Convert to fraction form
   1,622.78/2,436.55 = 1,069.14/x
3. Step 3: Cross multiply
   1,622.78x = 2,436.55 × 1,069.14
4. Step 4: Simplify right side
   1,622.78x = 2,605,013.07
5. Step 5: Solve for x
   x = 2,605,013.07/1,622.78
6. Step 6: Final answer
   x = 1,605.28