Finding the Third Proportional to 156,931 and 343,019

Step by Step Solution

1. Step 1: Write the proportion equation
   156,931 : 343,019 = 343,019 : x
2. Step 2: Convert to fraction form
   156,931/343,019 = 343,019/x
3. Step 3: Cross multiply
   156,931x = 343,019 × 343,019
4. Step 4: Simplify right side
   156,931x = 117,662,034,361
5. Step 5: Solve for x
   x = 117,662,034,361/156,931
6. Step 6: Final answer
   x = 749,769.23