Finding the Fourth Proportional to 1,111.79, 1,668.72 and 564.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.79 : 1,668.72 = 564.36 : x
2. Step 2: Convert to fraction form
   1,111.79/1,668.72 = 564.36/x
3. Step 3: Cross multiply
   1,111.79x = 1,668.72 × 564.36
4. Step 4: Simplify right side
   1,111.79x = 941,758.82
5. Step 5: Solve for x
   x = 941,758.82/1,111.79
6. Step 6: Final answer
   x = 847.07