Finding the Third Proportional to 42,860 and 87,808

Step by Step Solution

1. Step 1: Write the proportion equation
   42,860 : 87,808 = 87,808 : x
2. Step 2: Convert to fraction form
   42,860/87,808 = 87,808/x
3. Step 3: Cross multiply
   42,860x = 87,808 × 87,808
4. Step 4: Simplify right side
   42,860x = 7,710,244,864
5. Step 5: Solve for x
   x = 7,710,244,864/42,860
6. Step 6: Final answer
   x = 179,893.72