Finding the Third Proportional to 42,619 and 89,731

Step by Step Solution

1. Step 1: Write the proportion equation
   42,619 : 89,731 = 89,731 : x
2. Step 2: Convert to fraction form
   42,619/89,731 = 89,731/x
3. Step 3: Cross multiply
   42,619x = 89,731 × 89,731
4. Step 4: Simplify right side
   42,619x = 8,051,652,361
5. Step 5: Solve for x
   x = 8,051,652,361/42,619
6. Step 6: Final answer
   x = 188,921.66