Finding the Fourth Proportional to 9,018.23, 12,461.06 and 6,940.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,018.23 : 12,461.06 = 6,940.31 : x
2. Step 2: Convert to fraction form
   9,018.23/12,461.06 = 6,940.31/x
3. Step 3: Cross multiply
   9,018.23x = 12,461.06 × 6,940.31
4. Step 4: Simplify right side
   9,018.23x = 86,483,584.63
5. Step 5: Solve for x
   x = 86,483,584.63/9,018.23
6. Step 6: Final answer
   x = 9,589.86