Finding the Fourth Proportional to 16,289,913.30, 24,401,802.43 and 12,680,838.42

Step by Step Solution

1. Step 1: Write the proportion equation
   16,289,913.30 : 24,401,802.43 = 12,680,838.42 : x
2. Step 2: Convert to fraction form
   16,289,913.30/24,401,802.43 = 12,680,838.42/x
3. Step 3: Cross multiply
   16,289,913.30x = 24,401,802.43 × 12,680,838.42
4. Step 4: Simplify right side
   16,289,913.30x = 309,435,313,771,593.38
5. Step 5: Solve for x
   x = 309,435,313,771,593.38/16,289,913.30
6. Step 6: Final answer
   x = 18,995,516.31