Finding the Fourth Proportional to 9,812.72, 13,546.37 and 6,685.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,812.72 : 13,546.37 = 6,685.31 : x
2. Step 2: Convert to fraction form
   9,812.72/13,546.37 = 6,685.31/x
3. Step 3: Cross multiply
   9,812.72x = 13,546.37 × 6,685.31
4. Step 4: Simplify right side
   9,812.72x = 90,561,682.82
5. Step 5: Solve for x
   x = 90,561,682.82/9,812.72
6. Step 6: Final answer
   x = 9,229.01