Finding the Fourth Proportional to 12,978.89, 19,462.17 and 6,732.65

Step by Step Solution

1. Step 1: Write the proportion equation
   12,978.89 : 19,462.17 = 6,732.65 : x
2. Step 2: Convert to fraction form
   12,978.89/19,462.17 = 6,732.65/x
3. Step 3: Cross multiply
   12,978.89x = 19,462.17 × 6,732.65
4. Step 4: Simplify right side
   12,978.89x = 131,031,881.54
5. Step 5: Solve for x
   x = 131,031,881.54/12,978.89
6. Step 6: Final answer
   x = 10,095.77