Finding the Third Proportional to 90,207 and 142,831

Step by Step Solution

1. Step 1: Write the proportion equation
   90,207 : 142,831 = 142,831 : x
2. Step 2: Convert to fraction form
   90,207/142,831 = 142,831/x
3. Step 3: Cross multiply
   90,207x = 142,831 × 142,831
4. Step 4: Simplify right side
   90,207x = 20,400,694,561
5. Step 5: Solve for x
   x = 20,400,694,561/90,207
6. Step 6: Final answer
   x = 226,154.23