Finding the Third Proportional to 130,939.50 and 200,212.50

Step by Step Solution

1. Step 1: Write the proportion equation
   130,939.50 : 200,212.50 = 200,212.50 : x
2. Step 2: Convert to fraction form
   130,939.50/200,212.50 = 200,212.50/x
3. Step 3: Cross multiply
   130,939.50x = 200,212.50 × 200,212.50
4. Step 4: Simplify right side
   130,939.50x = 40,085,045,156.25
5. Step 5: Solve for x
   x = 40,085,045,156.25/130,939.50
6. Step 6: Final answer
   x = 306,134.09