Finding the Fourth Proportional to 12,064.68, 18,104.04 and 5,139

Step by Step Solution

1. Step 1: Write the proportion equation
   12,064.68 : 18,104.04 = 5,139 : x
2. Step 2: Convert to fraction form
   12,064.68/18,104.04 = 5,139/x
3. Step 3: Cross multiply
   12,064.68x = 18,104.04 × 5,139
4. Step 4: Simplify right side
   12,064.68x = 93,036,661.56
5. Step 5: Solve for x
   x = 93,036,661.56/12,064.68
6. Step 6: Final answer
   x = 7,711.49