Finding the Third Proportional to 156,780 and 343,008

Step by Step Solution

1. Step 1: Write the proportion equation
   156,780 : 343,008 = 343,008 : x
2. Step 2: Convert to fraction form
   156,780/343,008 = 343,008/x
3. Step 3: Cross multiply
   156,780x = 343,008 × 343,008
4. Step 4: Simplify right side
   156,780x = 117,654,488,064
5. Step 5: Solve for x
   x = 117,654,488,064/156,780
6. Step 6: Final answer
   x = 750,443.22