Finding the Fourth Proportional to 12,675.45, 19,011.69 and 3,909.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,675.45 : 19,011.69 = 3,909.61 : x
2. Step 2: Convert to fraction form
   12,675.45/19,011.69 = 3,909.61/x
3. Step 3: Cross multiply
   12,675.45x = 19,011.69 × 3,909.61
4. Step 4: Simplify right side
   12,675.45x = 74,328,293.34
5. Step 5: Solve for x
   x = 74,328,293.34/12,675.45
6. Step 6: Final answer
   x = 5,863.96