Finding the Fourth Proportional to 1,111.27, 1,663.83 and 560.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.27 : 1,663.83 = 560.76 : x
2. Step 2: Convert to fraction form
   1,111.27/1,663.83 = 560.76/x
3. Step 3: Cross multiply
   1,111.27x = 1,663.83 × 560.76
4. Step 4: Simplify right side
   1,111.27x = 933,006.51
5. Step 5: Solve for x
   x = 933,006.51/1,111.27
6. Step 6: Final answer
   x = 839.59