Finding the Fourth Proportional to 12,387.72, 18,574.65 and 4,065.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,387.72 : 18,574.65 = 4,065.51 : x
2. Step 2: Convert to fraction form
   12,387.72/18,574.65 = 4,065.51/x
3. Step 3: Cross multiply
   12,387.72x = 18,574.65 × 4,065.51
4. Step 4: Simplify right side
   12,387.72x = 75,515,425.32
5. Step 5: Solve for x
   x = 75,515,425.32/12,387.72
6. Step 6: Final answer
   x = 6,095.99