Finding the Fourth Proportional to 10,685.31, 16,016.58 and 5,424.27

Step by Step Solution

1. Step 1: Write the proportion equation
   10,685.31 : 16,016.58 = 5,424.27 : x
2. Step 2: Convert to fraction form
   10,685.31/16,016.58 = 5,424.27/x
3. Step 3: Cross multiply
   10,685.31x = 16,016.58 × 5,424.27
4. Step 4: Simplify right side
   10,685.31x = 86,878,254.40
5. Step 5: Solve for x
   x = 86,878,254.40/10,685.31
6. Step 6: Final answer
   x = 8,130.63