Finding the Third Proportional to 87,829 and 188,978

Step by Step Solution

1. Step 1: Write the proportion equation
   87,829 : 188,978 = 188,978 : x
2. Step 2: Convert to fraction form
   87,829/188,978 = 188,978/x
3. Step 3: Cross multiply
   87,829x = 188,978 × 188,978
4. Step 4: Simplify right side
   87,829x = 35,712,684,484
5. Step 5: Solve for x
   x = 35,712,684,484/87,829
6. Step 6: Final answer
   x = 406,616.09