Finding the Third Proportional to 155,715 and 339,570.75

Step by Step Solution

1. Step 1: Write the proportion equation
   155,715 : 339,570.75 = 339,570.75 : x
2. Step 2: Convert to fraction form
   155,715/339,570.75 = 339,570.75/x
3. Step 3: Cross multiply
   155,715x = 339,570.75 × 339,570.75
4. Step 4: Simplify right side
   155,715x = 115,308,294,255.56
5. Step 5: Solve for x
   x = 115,308,294,255.56/155,715
6. Step 6: Final answer
   x = 740,508.58