Finding the Third Proportional to 18,012.38 and 37,406.81

Step by Step Solution

1. Step 1: Write the proportion equation
   18,012.38 : 37,406.81 = 37,406.81 : x
2. Step 2: Convert to fraction form
   18,012.38/37,406.81 = 37,406.81/x
3. Step 3: Cross multiply
   18,012.38x = 37,406.81 × 37,406.81
4. Step 4: Simplify right side
   18,012.38x = 1,399,269,621.41
5. Step 5: Solve for x
   x = 1,399,269,621.41/18,012.38
6. Step 6: Final answer
   x = 77,683.79