Finding the Fourth Proportional to 37,357.56, 56,043 and 12,399.12

Step by Step Solution

1. Step 1: Write the proportion equation
   37,357.56 : 56,043 = 12,399.12 : x
2. Step 2: Convert to fraction form
   37,357.56/56,043 = 12,399.12/x
3. Step 3: Cross multiply
   37,357.56x = 56,043 × 12,399.12
4. Step 4: Simplify right side
   37,357.56x = 694,883,882.16
5. Step 5: Solve for x
   x = 694,883,882.16/37,357.56
6. Step 6: Final answer
   x = 18,600.89