Finding the Fourth Proportional to 13,127.43, 19,678.69 and 5,234.79

Step by Step Solution

1. Step 1: Write the proportion equation
   13,127.43 : 19,678.69 = 5,234.79 : x
2. Step 2: Convert to fraction form
   13,127.43/19,678.69 = 5,234.79/x
3. Step 3: Cross multiply
   13,127.43x = 19,678.69 × 5,234.79
4. Step 4: Simplify right side
   13,127.43x = 103,013,889.96
5. Step 5: Solve for x
   x = 103,013,889.96/13,127.43
6. Step 6: Final answer
   x = 7,847.22