Finding the Third Proportional to 17,906.63 and 39,387.38

Step by Step Solution

1. Step 1: Write the proportion equation
   17,906.63 : 39,387.38 = 39,387.38 : x
2. Step 2: Convert to fraction form
   17,906.63/39,387.38 = 39,387.38/x
3. Step 3: Cross multiply
   17,906.63x = 39,387.38 × 39,387.38
4. Step 4: Simplify right side
   17,906.63x = 1,551,365,309.39
5. Step 5: Solve for x
   x = 1,551,365,309.39/17,906.63
6. Step 6: Final answer
   x = 86,636.39