Finding the Third Proportional to 156,931 and 343,003

Step by Step Solution

1. Step 1: Write the proportion equation
   156,931 : 343,003 = 343,003 : x
2. Step 2: Convert to fraction form
   156,931/343,003 = 343,003/x
3. Step 3: Cross multiply
   156,931x = 343,003 × 343,003
4. Step 4: Simplify right side
   156,931x = 117,651,058,009
5. Step 5: Solve for x
   x = 117,651,058,009/156,931
6. Step 6: Final answer
   x = 749,699.28