Finding the Fourth Proportional to 12,445.97, 18,668.72 and 3,086.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,445.97 : 18,668.72 = 3,086.02 : x
2. Step 2: Convert to fraction form
   12,445.97/18,668.72 = 3,086.02/x
3. Step 3: Cross multiply
   12,445.97x = 18,668.72 × 3,086.02
4. Step 4: Simplify right side
   12,445.97x = 57,612,004.34
5. Step 5: Solve for x
   x = 57,612,004.34/12,445.97
6. Step 6: Final answer
   x = 4,628.97