Finding the Fourth Proportional to 1,109.36, 1,662.59 and 561.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.36 : 1,662.59 = 561.25 : x
2. Step 2: Convert to fraction form
   1,109.36/1,662.59 = 561.25/x
3. Step 3: Cross multiply
   1,109.36x = 1,662.59 × 561.25
4. Step 4: Simplify right side
   1,109.36x = 933,120.32
5. Step 5: Solve for x
   x = 933,120.32/1,109.36
6. Step 6: Final answer
   x = 841.13