Finding the Third Proportional to 88,419 and 136,912.50

Step by Step Solution

1. Step 1: Write the proportion equation
   88,419 : 136,912.50 = 136,912.50 : x
2. Step 2: Convert to fraction form
   88,419/136,912.50 = 136,912.50/x
3. Step 3: Cross multiply
   88,419x = 136,912.50 × 136,912.50
4. Step 4: Simplify right side
   88,419x = 18,745,032,656.25
5. Step 5: Solve for x
   x = 18,745,032,656.25/88,419
6. Step 6: Final answer
   x = 212,002.31