Finding the Fourth Proportional to 1,111.13, 1,533.15 and 669.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.13 : 1,533.15 = 669.04 : x
2. Step 2: Convert to fraction form
   1,111.13/1,533.15 = 669.04/x
3. Step 3: Cross multiply
   1,111.13x = 1,533.15 × 669.04
4. Step 4: Simplify right side
   1,111.13x = 1,025,734.84
5. Step 5: Solve for x
   x = 1,025,734.84/1,111.13
6. Step 6: Final answer
   x = 923.15