Finding the Fourth Proportional to 1,548.32, 2,136.72 and 885.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,548.32 : 2,136.72 = 885.20 : x
2. Step 2: Convert to fraction form
   1,548.32/2,136.72 = 885.20/x
3. Step 3: Cross multiply
   1,548.32x = 2,136.72 × 885.20
4. Step 4: Simplify right side
   1,548.32x = 1,891,424.54
5. Step 5: Solve for x
   x = 1,891,424.54/1,548.32
6. Step 6: Final answer
   x = 1,221.60