Finding the Fourth Proportional to 12,805.89, 17,673.29 and 7,771.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,805.89 : 17,673.29 = 7,771.39 : x
2. Step 2: Convert to fraction form
   12,805.89/17,673.29 = 7,771.39/x
3. Step 3: Cross multiply
   12,805.89x = 17,673.29 × 7,771.39
4. Step 4: Simplify right side
   12,805.89x = 137,346,004.42
5. Step 5: Solve for x
   x = 137,346,004.42/12,805.89
6. Step 6: Final answer
   x = 10,725.22