Finding the Fourth Proportional to 1,548.79, 2,137.22 and 885.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,548.79 : 2,137.22 = 885.55 : x
2. Step 2: Convert to fraction form
   1,548.79/2,137.22 = 885.55/x
3. Step 3: Cross multiply
   1,548.79x = 2,137.22 × 885.55
4. Step 4: Simplify right side
   1,548.79x = 1,892,600.06
5. Step 5: Solve for x
   x = 1,892,600.06/1,548.79
6. Step 6: Final answer
   x = 1,221.99