Finding the Third Proportional to 156,920 and 342,997

Step by Step Solution

1. Step 1: Write the proportion equation
   156,920 : 342,997 = 342,997 : x
2. Step 2: Convert to fraction form
   156,920/342,997 = 342,997/x
3. Step 3: Cross multiply
   156,920x = 342,997 × 342,997
4. Step 4: Simplify right side
   156,920x = 117,646,942,009
5. Step 5: Solve for x
   x = 117,646,942,009/156,920
6. Step 6: Final answer
   x = 749,725.61