Finding the Fourth Proportional to 12,307.22, 18,456.96 and 3,985.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,307.22 : 18,456.96 = 3,985.31 : x
2. Step 2: Convert to fraction form
   12,307.22/18,456.96 = 3,985.31/x
3. Step 3: Cross multiply
   12,307.22x = 18,456.96 × 3,985.31
4. Step 4: Simplify right side
   12,307.22x = 73,556,687.33
5. Step 5: Solve for x
   x = 73,556,687.33/12,307.22
6. Step 6: Final answer
   x = 5,976.71