Finding the Third Proportional to 156,978 and 340,026

Step by Step Solution

1. Step 1: Write the proportion equation
   156,978 : 340,026 = 340,026 : x
2. Step 2: Convert to fraction form
   156,978/340,026 = 340,026/x
3. Step 3: Cross multiply
   156,978x = 340,026 × 340,026
4. Step 4: Simplify right side
   156,978x = 115,617,680,676
5. Step 5: Solve for x
   x = 115,617,680,676/156,978
6. Step 6: Final answer
   x = 736,521.56