Finding the Fourth Proportional to 10,832.31, 16,237.89 and 5,285.43

Step by Step Solution

1. Step 1: Write the proportion equation
   10,832.31 : 16,237.89 = 5,285.43 : x
2. Step 2: Convert to fraction form
   10,832.31/16,237.89 = 5,285.43/x
3. Step 3: Cross multiply
   10,832.31x = 16,237.89 × 5,285.43
4. Step 4: Simplify right side
   10,832.31x = 85,824,230.94
5. Step 5: Solve for x
   x = 85,824,230.94/10,832.31
6. Step 6: Final answer
   x = 7,922.99