Finding the Fourth Proportional to 12,680.43, 19,024.69 and 5,285.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,680.43 : 19,024.69 = 5,285.67 : x
2. Step 2: Convert to fraction form
   12,680.43/19,024.69 = 5,285.67/x
3. Step 3: Cross multiply
   12,680.43x = 19,024.69 × 5,285.67
4. Step 4: Simplify right side
   12,680.43x = 100,558,233.19
5. Step 5: Solve for x
   x = 100,558,233.19/12,680.43
6. Step 6: Final answer
   x = 7,930.19