Finding the Third Proportional to 157,422 and 339,720.50

Step by Step Solution

1. Step 1: Write the proportion equation
   157,422 : 339,720.50 = 339,720.50 : x
2. Step 2: Convert to fraction form
   157,422/339,720.50 = 339,720.50/x
3. Step 3: Cross multiply
   157,422x = 339,720.50 × 339,720.50
4. Step 4: Simplify right side
   157,422x = 115,410,018,120.25
5. Step 5: Solve for x
   x = 115,410,018,120.25/157,422
6. Step 6: Final answer
   x = 733,125.09