Finding the Third Proportional to 393,957 and 611,185.50

Step by Step Solution

1. Step 1: Write the proportion equation
   393,957 : 611,185.50 = 611,185.50 : x
2. Step 2: Convert to fraction form
   393,957/611,185.50 = 611,185.50/x
3. Step 3: Cross multiply
   393,957x = 611,185.50 × 611,185.50
4. Step 4: Simplify right side
   393,957x = 373,547,715,410.25
5. Step 5: Solve for x
   x = 373,547,715,410.25/393,957
6. Step 6: Final answer
   x = 948,194.13