Finding the Third Proportional to 18,858.28 and 39,266.72

Step by Step Solution

1. Step 1: Write the proportion equation
   18,858.28 : 39,266.72 = 39,266.72 : x
2. Step 2: Convert to fraction form
   18,858.28/39,266.72 = 39,266.72/x
3. Step 3: Cross multiply
   18,858.28x = 39,266.72 × 39,266.72
4. Step 4: Simplify right side
   18,858.28x = 1,541,875,201.39
5. Step 5: Solve for x
   x = 1,541,875,201.39/18,858.28
6. Step 6: Final answer
   x = 81,761.17