Finding the Fourth Proportional to 12,542.78, 18,821.46 and 5,152.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,542.78 : 18,821.46 = 5,152.56 : x
2. Step 2: Convert to fraction form
   12,542.78/18,821.46 = 5,152.56/x
3. Step 3: Cross multiply
   12,542.78x = 18,821.46 × 5,152.56
4. Step 4: Simplify right side
   12,542.78x = 96,978,701.94
5. Step 5: Solve for x
   x = 96,978,701.94/12,542.78
6. Step 6: Final answer
   x = 7,731.83