Finding the Third Proportional to 40,316 and 87,630

Step by Step Solution

1. Step 1: Write the proportion equation
   40,316 : 87,630 = 87,630 : x
2. Step 2: Convert to fraction form
   40,316/87,630 = 87,630/x
3. Step 3: Cross multiply
   40,316x = 87,630 × 87,630
4. Step 4: Simplify right side
   40,316x = 7,679,016,900
5. Step 5: Solve for x
   x = 7,679,016,900/40,316
6. Step 6: Final answer
   x = 190,470.70