Finding the Fourth Proportional to 1,111.23, 1,666.71 and 563.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.23 : 1,666.71 = 563.81 : x
2. Step 2: Convert to fraction form
   1,111.23/1,666.71 = 563.81/x
3. Step 3: Cross multiply
   1,111.23x = 1,666.71 × 563.81
4. Step 4: Simplify right side
   1,111.23x = 939,699.43
5. Step 5: Solve for x
   x = 939,699.43/1,111.23
6. Step 6: Final answer
   x = 845.64