Finding the Fourth Proportional to 12,979.34, 19,456.07 and 5,484.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,979.34 : 19,456.07 = 5,484.79 : x
2. Step 2: Convert to fraction form
   12,979.34/19,456.07 = 5,484.79/x
3. Step 3: Cross multiply
   12,979.34x = 19,456.07 × 5,484.79
4. Step 4: Simplify right side
   12,979.34x = 106,712,458.56
5. Step 5: Solve for x
   x = 106,712,458.56/12,979.34
6. Step 6: Final answer
   x = 8,221.72