Finding the Fourth Proportional to 12,638.76, 18,960.83 and 4,847.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,638.76 : 18,960.83 = 4,847.50 : x
2. Step 2: Convert to fraction form
   12,638.76/18,960.83 = 4,847.50/x
3. Step 3: Cross multiply
   12,638.76x = 18,960.83 × 4,847.50
4. Step 4: Simplify right side
   12,638.76x = 91,912,623.43
5. Step 5: Solve for x
   x = 91,912,623.43/12,638.76
6. Step 6: Final answer
   x = 7,272.28