Finding the Third Proportional to 156,978 and 341,172

Step by Step Solution

1. Step 1: Write the proportion equation
   156,978 : 341,172 = 341,172 : x
2. Step 2: Convert to fraction form
   156,978/341,172 = 341,172/x
3. Step 3: Cross multiply
   156,978x = 341,172 × 341,172
4. Step 4: Simplify right side
   156,978x = 116,398,333,584
5. Step 5: Solve for x
   x = 116,398,333,584/156,978
6. Step 6: Final answer
   x = 741,494.56