Finding the Fourth Proportional to 1,111.51, 1,533.83 and 669.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.51 : 1,533.83 = 669.39 : x
2. Step 2: Convert to fraction form
   1,111.51/1,533.83 = 669.39/x
3. Step 3: Cross multiply
   1,111.51x = 1,533.83 × 669.39
4. Step 4: Simplify right side
   1,111.51x = 1,026,730.46
5. Step 5: Solve for x
   x = 1,026,730.46/1,111.51
6. Step 6: Final answer
   x = 923.73