Finding the Fourth Proportional to 8,532.05, 12,789.98 and 2,981.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,532.05 : 12,789.98 = 2,981.78 : x
2. Step 2: Convert to fraction form
   8,532.05/12,789.98 = 2,981.78/x
3. Step 3: Cross multiply
   8,532.05x = 12,789.98 × 2,981.78
4. Step 4: Simplify right side
   8,532.05x = 38,136,906.56
5. Step 5: Solve for x
   x = 38,136,906.56/8,532.05
6. Step 6: Final answer
   x = 4,469.84