Finding the Third Proportional to 87,652 and 191,978

Step by Step Solution

1. Step 1: Write the proportion equation
   87,652 : 191,978 = 191,978 : x
2. Step 2: Convert to fraction form
   87,652/191,978 = 191,978/x
3. Step 3: Cross multiply
   87,652x = 191,978 × 191,978
4. Step 4: Simplify right side
   87,652x = 36,855,552,484
5. Step 5: Solve for x
   x = 36,855,552,484/87,652
6. Step 6: Final answer
   x = 420,475.89