Finding the Third Proportional to 156,910 and 342,980

Step by Step Solution

1. Step 1: Write the proportion equation
   156,910 : 342,980 = 342,980 : x
2. Step 2: Convert to fraction form
   156,910/342,980 = 342,980/x
3. Step 3: Cross multiply
   156,910x = 342,980 × 342,980
4. Step 4: Simplify right side
   156,910x = 117,635,280,400
5. Step 5: Solve for x
   x = 117,635,280,400/156,910
6. Step 6: Final answer
   x = 749,699.07