Finding the Fourth Proportional to 12,548.78, 18,826.37 and 4,757.74

Step by Step Solution

1. Step 1: Write the proportion equation
   12,548.78 : 18,826.37 = 4,757.74 : x
2. Step 2: Convert to fraction form
   12,548.78/18,826.37 = 4,757.74/x
3. Step 3: Cross multiply
   12,548.78x = 18,826.37 × 4,757.74
4. Step 4: Simplify right side
   12,548.78x = 89,570,973.60
5. Step 5: Solve for x
   x = 89,570,973.60/12,548.78
6. Step 6: Final answer
   x = 7,137.82