Finding the Fourth Proportional to 1,111.41, 1,533.74 and 669.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.41 : 1,533.74 = 669.42 : x
2. Step 2: Convert to fraction form
   1,111.41/1,533.74 = 669.42/x
3. Step 3: Cross multiply
   1,111.41x = 1,533.74 × 669.42
4. Step 4: Simplify right side
   1,111.41x = 1,026,712.88
5. Step 5: Solve for x
   x = 1,026,712.88/1,111.41
6. Step 6: Final answer
   x = 923.79