Finding the Fourth Proportional to 12,505, 18,757.32 and 3,739.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,505 : 18,757.32 = 3,739.72 : x
2. Step 2: Convert to fraction form
   12,505/18,757.32 = 3,739.72/x
3. Step 3: Cross multiply
   12,505x = 18,757.32 × 3,739.72
4. Step 4: Simplify right side
   12,505x = 70,147,124.75
5. Step 5: Solve for x
   x = 70,147,124.75/12,505
6. Step 6: Final answer
   x = 5,609.53