Finding the Third Proportional to 87,984 and 139,815

Step by Step Solution

1. Step 1: Write the proportion equation
   87,984 : 139,815 = 139,815 : x
2. Step 2: Convert to fraction form
   87,984/139,815 = 139,815/x
3. Step 3: Cross multiply
   87,984x = 139,815 × 139,815
4. Step 4: Simplify right side
   87,984x = 19,548,234,225
5. Step 5: Solve for x
   x = 19,548,234,225/87,984
6. Step 6: Final answer
   x = 222,179.42