Finding the Fourth Proportional to 12,951.02, 19,421.78 and 4,628.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,951.02 : 19,421.78 = 4,628.78 : x
2. Step 2: Convert to fraction form
   12,951.02/19,421.78 = 4,628.78/x
3. Step 3: Cross multiply
   12,951.02x = 19,421.78 × 4,628.78
4. Step 4: Simplify right side
   12,951.02x = 89,899,099.41
5. Step 5: Solve for x
   x = 89,899,099.41/12,951.02
6. Step 6: Final answer
   x = 6,941.47