Finding the Third Proportional to 140,970.50 and 215,920.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,970.50 : 215,920.50 = 215,920.50 : x
2. Step 2: Convert to fraction form
   140,970.50/215,920.50 = 215,920.50/x
3. Step 3: Cross multiply
   140,970.50x = 215,920.50 × 215,920.50
4. Step 4: Simplify right side
   140,970.50x = 46,621,662,320.25
5. Step 5: Solve for x
   x = 46,621,662,320.25/140,970.50
6. Step 6: Final answer
   x = 330,719.28