Finding the Fourth Proportional to 37,719.42, 56,586.03 and 12,420.37

Step by Step Solution

1. Step 1: Write the proportion equation
   37,719.42 : 56,586.03 = 12,420.37 : x
2. Step 2: Convert to fraction form
   37,719.42/56,586.03 = 12,420.37/x
3. Step 3: Cross multiply
   37,719.42x = 56,586.03 × 12,420.37
4. Step 4: Simplify right side
   37,719.42x = 702,819,429.43
5. Step 5: Solve for x
   x = 702,819,429.43/37,719.42
6. Step 6: Final answer
   x = 18,632.83