Finding the Third Proportional to 42,145.31 and 89,165.81

Step by Step Solution

1. Step 1: Write the proportion equation
   42,145.31 : 89,165.81 = 89,165.81 : x
2. Step 2: Convert to fraction form
   42,145.31/89,165.81 = 89,165.81/x
3. Step 3: Cross multiply
   42,145.31x = 89,165.81 × 89,165.81
4. Step 4: Simplify right side
   42,145.31x = 7,950,542,118.79
5. Step 5: Solve for x
   x = 7,950,542,118.79/42,145.31
6. Step 6: Final answer
   x = 188,645.94