Finding the Fourth Proportional to 1,111.42, 1,533.62 and 663.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.42 : 1,533.62 = 663.29 : x
2. Step 2: Convert to fraction form
   1,111.42/1,533.62 = 663.29/x
3. Step 3: Cross multiply
   1,111.42x = 1,533.62 × 663.29
4. Step 4: Simplify right side
   1,111.42x = 1,017,223.83
5. Step 5: Solve for x
   x = 1,017,223.83/1,111.42
6. Step 6: Final answer
   x = 915.25