Finding the Fourth Proportional to 1,109.33, 1,665.01 and 561.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.33 : 1,665.01 = 561.89 : x
2. Step 2: Convert to fraction form
   1,109.33/1,665.01 = 561.89/x
3. Step 3: Cross multiply
   1,109.33x = 1,665.01 × 561.89
4. Step 4: Simplify right side
   1,109.33x = 935,552.47
5. Step 5: Solve for x
   x = 935,552.47/1,109.33
6. Step 6: Final answer
   x = 843.35