Finding the Third Proportional to 18,421.17 and 39,471.05

Step by Step Solution

1. Step 1: Write the proportion equation
   18,421.17 : 39,471.05 = 39,471.05 : x
2. Step 2: Convert to fraction form
   18,421.17/39,471.05 = 39,471.05/x
3. Step 3: Cross multiply
   18,421.17x = 39,471.05 × 39,471.05
4. Step 4: Simplify right side
   18,421.17x = 1,557,963,541.41
5. Step 5: Solve for x
   x = 1,557,963,541.41/18,421.17
6. Step 6: Final answer
   x = 84,574.62