Finding the Fourth Proportional to 12,648.72, 18,968.62 and 4,212.93

Step by Step Solution

1. Step 1: Write the proportion equation
   12,648.72 : 18,968.62 = 4,212.93 : x
2. Step 2: Convert to fraction form
   12,648.72/18,968.62 = 4,212.93/x
3. Step 3: Cross multiply
   12,648.72x = 18,968.62 × 4,212.93
4. Step 4: Simplify right side
   12,648.72x = 79,913,528.86
5. Step 5: Solve for x
   x = 79,913,528.86/12,648.72
6. Step 6: Final answer
   x = 6,317.92