Finding the Third Proportional to 42,656 and 87,008

Step by Step Solution

1. Step 1: Write the proportion equation
   42,656 : 87,008 = 87,008 : x
2. Step 2: Convert to fraction form
   42,656/87,008 = 87,008/x
3. Step 3: Cross multiply
   42,656x = 87,008 × 87,008
4. Step 4: Simplify right side
   42,656x = 7,570,392,064
5. Step 5: Solve for x
   x = 7,570,392,064/42,656
6. Step 6: Final answer
   x = 177,475.43