Finding the Fourth Proportional to 1,111.59, 1,533.63 and 669.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.59 : 1,533.63 = 669.33 : x
2. Step 2: Convert to fraction form
   1,111.59/1,533.63 = 669.33/x
3. Step 3: Cross multiply
   1,111.59x = 1,533.63 × 669.33
4. Step 4: Simplify right side
   1,111.59x = 1,026,504.57
5. Step 5: Solve for x
   x = 1,026,504.57/1,111.59
6. Step 6: Final answer
   x = 923.46