Finding the Fourth Proportional to 12,052.58, 16,638.59 and 7,578.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,052.58 : 16,638.59 = 7,578.79 : x
2. Step 2: Convert to fraction form
   12,052.58/16,638.59 = 7,578.79/x
3. Step 3: Cross multiply
   12,052.58x = 16,638.59 × 7,578.79
4. Step 4: Simplify right side
   12,052.58x = 126,100,356.86
5. Step 5: Solve for x
   x = 126,100,356.86/12,052.58
6. Step 6: Final answer
   x = 10,462.52