Finding the Third Proportional to 20,570 and 42,756

Step by Step Solution

1. Step 1: Write the proportion equation
   20,570 : 42,756 = 42,756 : x
2. Step 2: Convert to fraction form
   20,570/42,756 = 42,756/x
3. Step 3: Cross multiply
   20,570x = 42,756 × 42,756
4. Step 4: Simplify right side
   20,570x = 1,828,075,536
5. Step 5: Solve for x
   x = 1,828,075,536/20,570
6. Step 6: Final answer
   x = 88,870.95