Finding the Fourth Proportional to 12,979.34, 19,469.16 and 4,665.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,979.34 : 19,469.16 = 4,665.30 : x
2. Step 2: Convert to fraction form
   12,979.34/19,469.16 = 4,665.30/x
3. Step 3: Cross multiply
   12,979.34x = 19,469.16 × 4,665.30
4. Step 4: Simplify right side
   12,979.34x = 90,829,399.14
5. Step 5: Solve for x
   x = 90,829,399.14/12,979.34
6. Step 6: Final answer
   x = 6,998.00