Finding the Third Proportional to 79,912.50 and 172,279.50

Step by Step Solution

1. Step 1: Write the proportion equation
   79,912.50 : 172,279.50 = 172,279.50 : x
2. Step 2: Convert to fraction form
   79,912.50/172,279.50 = 172,279.50/x
3. Step 3: Cross multiply
   79,912.50x = 172,279.50 × 172,279.50
4. Step 4: Simplify right side
   79,912.50x = 29,680,226,120.25
5. Step 5: Solve for x
   x = 29,680,226,120.25/79,912.50
6. Step 6: Final answer
   x = 371,409.06