Finding the Fourth Proportional to 2,616.24, 3,924.72 and 885.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.24 : 3,924.72 = 885.12 : x
2. Step 2: Convert to fraction form
   2,616.24/3,924.72 = 885.12/x
3. Step 3: Cross multiply
   2,616.24x = 3,924.72 × 885.12
4. Step 4: Simplify right side
   2,616.24x = 3,473,848.17
5. Step 5: Solve for x
   x = 3,473,848.17/2,616.24
6. Step 6: Final answer
   x = 1,327.80