Finding the Third Proportional to 156,978 and 340,060

Step by Step Solution

1. Step 1: Write the proportion equation
   156,978 : 340,060 = 340,060 : x
2. Step 2: Convert to fraction form
   156,978/340,060 = 340,060/x
3. Step 3: Cross multiply
   156,978x = 340,060 × 340,060
4. Step 4: Simplify right side
   156,978x = 115,640,803,600
5. Step 5: Solve for x
   x = 115,640,803,600/156,978
6. Step 6: Final answer
   x = 736,668.86