Finding the Third Proportional to 21,976.31 and 42,855.33

Step by Step Solution

1. Step 1: Write the proportion equation
   21,976.31 : 42,855.33 = 42,855.33 : x
2. Step 2: Convert to fraction form
   21,976.31/42,855.33 = 42,855.33/x
3. Step 3: Cross multiply
   21,976.31x = 42,855.33 × 42,855.33
4. Step 4: Simplify right side
   21,976.31x = 1,836,579,148.70
5. Step 5: Solve for x
   x = 1,836,579,148.70/21,976.31
6. Step 6: Final answer
   x = 83,570.85