Finding the Fourth Proportional to 12,776.62, 19,165.89 and 3,416.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,776.62 : 19,165.89 = 3,416.43 : x
2. Step 2: Convert to fraction form
   12,776.62/19,165.89 = 3,416.43/x
3. Step 3: Cross multiply
   12,776.62x = 19,165.89 × 3,416.43
4. Step 4: Simplify right side
   12,776.62x = 65,478,921.57
5. Step 5: Solve for x
   x = 65,478,921.57/12,776.62
6. Step 6: Final answer
   x = 5,124.90