Finding the Fourth Proportional to 1,209.94, 1,815.37 and 560.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,209.94 : 1,815.37 = 560.22 : x
2. Step 2: Convert to fraction form
   1,209.94/1,815.37 = 560.22/x
3. Step 3: Cross multiply
   1,209.94x = 1,815.37 × 560.22
4. Step 4: Simplify right side
   1,209.94x = 1,017,003.78
5. Step 5: Solve for x
   x = 1,017,003.78/1,209.94
6. Step 6: Final answer
   x = 840.54