Finding the Fourth Proportional to 37,707, 56,563.24 and 12,738.75

Step by Step Solution

1. Step 1: Write the proportion equation
   37,707 : 56,563.24 = 12,738.75 : x
2. Step 2: Convert to fraction form
   37,707/56,563.24 = 12,738.75/x
3. Step 3: Cross multiply
   37,707x = 56,563.24 × 12,738.75
4. Step 4: Simplify right side
   37,707x = 720,544,973.55
5. Step 5: Solve for x
   x = 720,544,973.55/37,707
6. Step 6: Final answer
   x = 19,109.05