Finding the Fourth Proportional to 1,112.27, 1,665.32 and 561.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.27 : 1,665.32 = 561.76 : x
2. Step 2: Convert to fraction form
   1,112.27/1,665.32 = 561.76/x
3. Step 3: Cross multiply
   1,112.27x = 1,665.32 × 561.76
4. Step 4: Simplify right side
   1,112.27x = 935,510.16
5. Step 5: Solve for x
   x = 935,510.16/1,112.27
6. Step 6: Final answer
   x = 841.08