Finding the Fourth Proportional to 12,069.52, 18,104.76 and 5,139.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,069.52 : 18,104.76 = 5,139.28 : x
2. Step 2: Convert to fraction form
   12,069.52/18,104.76 = 5,139.28/x
3. Step 3: Cross multiply
   12,069.52x = 18,104.76 × 5,139.28
4. Step 4: Simplify right side
   12,069.52x = 93,045,430.97
5. Step 5: Solve for x
   x = 93,045,430.97/12,069.52
6. Step 6: Final answer
   x = 7,709.12