Finding the Third Proportional to 87,978 and 191,838

Step by Step Solution

1. Step 1: Write the proportion equation
   87,978 : 191,838 = 191,838 : x
2. Step 2: Convert to fraction form
   87,978/191,838 = 191,838/x
3. Step 3: Cross multiply
   87,978x = 191,838 × 191,838
4. Step 4: Simplify right side
   87,978x = 36,801,818,244
5. Step 5: Solve for x
   x = 36,801,818,244/87,978
6. Step 6: Final answer
   x = 418,307.06