Finding the Fourth Proportional to 1,111.17, 1,533.41 and 669.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.17 : 1,533.41 = 669.08 : x
2. Step 2: Convert to fraction form
   1,111.17/1,533.41 = 669.08/x
3. Step 3: Cross multiply
   1,111.17x = 1,533.41 × 669.08
4. Step 4: Simplify right side
   1,111.17x = 1,025,973.96
5. Step 5: Solve for x
   x = 1,025,973.96/1,111.17
6. Step 6: Final answer
   x = 923.33