Finding the Third Proportional to 72,190.50 and 173,915.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,190.50 : 173,915.50 = 173,915.50 : x
2. Step 2: Convert to fraction form
   72,190.50/173,915.50 = 173,915.50/x
3. Step 3: Cross multiply
   72,190.50x = 173,915.50 × 173,915.50
4. Step 4: Simplify right side
   72,190.50x = 30,246,601,140.25
5. Step 5: Solve for x
   x = 30,246,601,140.25/72,190.50
6. Step 6: Final answer
   x = 418,983.12