Finding the Third Proportional to 156,939 and 342,308

Step by Step Solution

1. Step 1: Write the proportion equation
   156,939 : 342,308 = 342,308 : x
2. Step 2: Convert to fraction form
   156,939/342,308 = 342,308/x
3. Step 3: Cross multiply
   156,939x = 342,308 × 342,308
4. Step 4: Simplify right side
   156,939x = 117,174,766,864
5. Step 5: Solve for x
   x = 117,174,766,864/156,939
6. Step 6: Final answer
   x = 746,626.19