Finding the Third Proportional to 151,422 and 318,538.50

Step by Step Solution

1. Step 1: Write the proportion equation
   151,422 : 318,538.50 = 318,538.50 : x
2. Step 2: Convert to fraction form
   151,422/318,538.50 = 318,538.50/x
3. Step 3: Cross multiply
   151,422x = 318,538.50 × 318,538.50
4. Step 4: Simplify right side
   151,422x = 101,466,775,982.25
5. Step 5: Solve for x
   x = 101,466,775,982.25/151,422
6. Step 6: Final answer
   x = 670,092.69