Finding the Fourth Proportional to 1,111.73, 1,533.97 and 663.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.73 : 1,533.97 = 663.46 : x
2. Step 2: Convert to fraction form
   1,111.73/1,533.97 = 663.46/x
3. Step 3: Cross multiply
   1,111.73x = 1,533.97 × 663.46
4. Step 4: Simplify right side
   1,111.73x = 1,017,724.73
5. Step 5: Solve for x
   x = 1,017,724.73/1,111.73
6. Step 6: Final answer
   x = 915.45