Finding the Fourth Proportional to 37,700.78, 56,527.94 and 12,738.47

Step by Step Solution

1. Step 1: Write the proportion equation
   37,700.78 : 56,527.94 = 12,738.47 : x
2. Step 2: Convert to fraction form
   37,700.78/56,527.94 = 12,738.47/x
3. Step 3: Cross multiply
   37,700.78x = 56,527.94 × 12,738.47
4. Step 4: Simplify right side
   37,700.78x = 720,079,217.06
5. Step 5: Solve for x
   x = 720,079,217.06/37,700.78
6. Step 6: Final answer
   x = 19,099.85