Finding the Third Proportional to 42,588 and 87,909

Step by Step Solution

1. Step 1: Write the proportion equation
   42,588 : 87,909 = 87,909 : x
2. Step 2: Convert to fraction form
   42,588/87,909 = 87,909/x
3. Step 3: Cross multiply
   42,588x = 87,909 × 87,909
4. Step 4: Simplify right side
   42,588x = 7,727,992,281
5. Step 5: Solve for x
   x = 7,727,992,281/42,588
6. Step 6: Final answer
   x = 181,459.38