Finding the Fourth Proportional to 12,648.69, 18,975.74 and 4,749.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,648.69 : 18,975.74 = 4,749.98 : x
2. Step 2: Convert to fraction form
   12,648.69/18,975.74 = 4,749.98/x
3. Step 3: Cross multiply
   12,648.69x = 18,975.74 × 4,749.98
4. Step 4: Simplify right side
   12,648.69x = 90,134,266.86
5. Step 5: Solve for x
   x = 90,134,266.86/12,648.69
6. Step 6: Final answer
   x = 7,125.98