Finding the Third Proportional to 343,709 and 755,123

Step by Step Solution

1. Step 1: Write the proportion equation
   343,709 : 755,123 = 755,123 : x
2. Step 2: Convert to fraction form
   343,709/755,123 = 755,123/x
3. Step 3: Cross multiply
   343,709x = 755,123 × 755,123
4. Step 4: Simplify right side
   343,709x = 570,210,745,129
5. Step 5: Solve for x
   x = 570,210,745,129/343,709
6. Step 6: Final answer
   x = 1,658,992.77