Finding the Fourth Proportional to 10,860.52, 16,298.10 and 5,309.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,860.52 : 16,298.10 = 5,309.20 : x
2. Step 2: Convert to fraction form
   10,860.52/16,298.10 = 5,309.20/x
3. Step 3: Cross multiply
   10,860.52x = 16,298.10 × 5,309.20
4. Step 4: Simplify right side
   10,860.52x = 86,529,872.52
5. Step 5: Solve for x
   x = 86,529,872.52/10,860.52
6. Step 6: Final answer
   x = 7,967.38