Finding the Fourth Proportional to 12,309.08, 18,456.29 and 5,736.74

Step by Step Solution

1. Step 1: Write the proportion equation
   12,309.08 : 18,456.29 = 5,736.74 : x
2. Step 2: Convert to fraction form
   12,309.08/18,456.29 = 5,736.74/x
3. Step 3: Cross multiply
   12,309.08x = 18,456.29 × 5,736.74
4. Step 4: Simplify right side
   12,309.08x = 105,878,937.09
5. Step 5: Solve for x
   x = 105,878,937.09/12,309.08
6. Step 6: Final answer
   x = 8,601.69