Finding the Fourth Proportional to 1,103.44, 1,522.59 and 661.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.44 : 1,522.59 = 661.25 : x
2. Step 2: Convert to fraction form
   1,103.44/1,522.59 = 661.25/x
3. Step 3: Cross multiply
   1,103.44x = 1,522.59 × 661.25
4. Step 4: Simplify right side
   1,103.44x = 1,006,812.64
5. Step 5: Solve for x
   x = 1,006,812.64/1,103.44
6. Step 6: Final answer
   x = 912.43