Finding the Fourth Proportional to 8,376.80, 12,564.59 and 3,379.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,376.80 : 12,564.59 = 3,379.50 : x
2. Step 2: Convert to fraction form
   8,376.80/12,564.59 = 3,379.50/x
3. Step 3: Cross multiply
   8,376.80x = 12,564.59 × 3,379.50
4. Step 4: Simplify right side
   8,376.80x = 42,462,031.91
5. Step 5: Solve for x
   x = 42,462,031.91/8,376.80
6. Step 6: Final answer
   x = 5,069.00