Finding the Fourth Proportional to 1,109.46, 1,664.57 and 561.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.46 : 1,664.57 = 561.18 : x
2. Step 2: Convert to fraction form
   1,109.46/1,664.57 = 561.18/x
3. Step 3: Cross multiply
   1,109.46x = 1,664.57 × 561.18
4. Step 4: Simplify right side
   1,109.46x = 934,123.39
5. Step 5: Solve for x
   x = 934,123.39/1,109.46
6. Step 6: Final answer
   x = 841.96