Finding the Third Proportional to 153,957 and 320,158.50

Step by Step Solution

1. Step 1: Write the proportion equation
   153,957 : 320,158.50 = 320,158.50 : x
2. Step 2: Convert to fraction form
   153,957/320,158.50 = 320,158.50/x
3. Step 3: Cross multiply
   153,957x = 320,158.50 × 320,158.50
4. Step 4: Simplify right side
   153,957x = 102,501,465,122.25
5. Step 5: Solve for x
   x = 102,501,465,122.25/153,957
6. Step 6: Final answer
   x = 665,779.83