Finding the Fourth Proportional to 12,304.95, 18,461.61 and 3,985.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,304.95 : 18,461.61 = 3,985.31 : x
2. Step 2: Convert to fraction form
   12,304.95/18,461.61 = 3,985.31/x
3. Step 3: Cross multiply
   12,304.95x = 18,461.61 × 3,985.31
4. Step 4: Simplify right side
   12,304.95x = 73,575,146.64
5. Step 5: Solve for x
   x = 73,575,146.64/12,304.95
6. Step 6: Final answer
   x = 5,979.31