Finding the Fourth Proportional to 8,428.50, 12,648.51 and 2,956.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,428.50 : 12,648.51 = 2,956.50 : x
2. Step 2: Convert to fraction form
   8,428.50/12,648.51 = 2,956.50/x
3. Step 3: Cross multiply
   8,428.50x = 12,648.51 × 2,956.50
4. Step 4: Simplify right side
   8,428.50x = 37,395,319.82
5. Step 5: Solve for x
   x = 37,395,319.82/8,428.50
6. Step 6: Final answer
   x = 4,436.77