Finding the Fourth Proportional to 7,862.72, 10,853.28 and 5,069.12

Step by Step Solution

1. Step 1: Write the proportion equation
   7,862.72 : 10,853.28 = 5,069.12 : x
2. Step 2: Convert to fraction form
   7,862.72/10,853.28 = 5,069.12/x
3. Step 3: Cross multiply
   7,862.72x = 10,853.28 × 5,069.12
4. Step 4: Simplify right side
   7,862.72x = 55,016,578.71
5. Step 5: Solve for x
   x = 55,016,578.71/7,862.72
6. Step 6: Final answer
   x = 6,997.14