Finding the Fourth Proportional to 8,980.50, 13,467.50 and 3,786.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,980.50 : 13,467.50 = 3,786.78 : x
2. Step 2: Convert to fraction form
   8,980.50/13,467.50 = 3,786.78/x
3. Step 3: Cross multiply
   8,980.50x = 13,467.50 × 3,786.78
4. Step 4: Simplify right side
   8,980.50x = 50,998,418.61
5. Step 5: Solve for x
   x = 50,998,418.61/8,980.50
6. Step 6: Final answer
   x = 5,678.80