Finding the Fourth Proportional to 9,972.72, 14,965.56 and 4,779

Step by Step Solution

1. Step 1: Write the proportion equation
   9,972.72 : 14,965.56 = 4,779 : x
2. Step 2: Convert to fraction form
   9,972.72/14,965.56 = 4,779/x
3. Step 3: Cross multiply
   9,972.72x = 14,965.56 × 4,779
4. Step 4: Simplify right side
   9,972.72x = 71,520,411.24
5. Step 5: Solve for x
   x = 71,520,411.24/9,972.72
6. Step 6: Final answer
   x = 7,171.61