Finding the Fourth Proportional to 8,981.50, 13,469 and 3,787.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,981.50 : 13,469 = 3,787.78 : x
2. Step 2: Convert to fraction form
   8,981.50/13,469 = 3,787.78/x
3. Step 3: Cross multiply
   8,981.50x = 13,469 × 3,787.78
4. Step 4: Simplify right side
   8,981.50x = 51,017,608.82
5. Step 5: Solve for x
   x = 51,017,608.82/8,981.50
6. Step 6: Final answer
   x = 5,680.30