Finding the Third Proportional to 42,916 and 86,998.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,916 : 86,998.50 = 86,998.50 : x
2. Step 2: Convert to fraction form
   42,916/86,998.50 = 86,998.50/x
3. Step 3: Cross multiply
   42,916x = 86,998.50 × 86,998.50
4. Step 4: Simplify right side
   42,916x = 7,568,739,002.25
5. Step 5: Solve for x
   x = 7,568,739,002.25/42,916
6. Step 6: Final answer
   x = 176,361.71