Finding the Third Proportional to 156,778 and 338,710

Step by Step Solution

1. Step 1: Write the proportion equation
   156,778 : 338,710 = 338,710 : x
2. Step 2: Convert to fraction form
   156,778/338,710 = 338,710/x
3. Step 3: Cross multiply
   156,778x = 338,710 × 338,710
4. Step 4: Simplify right side
   156,778x = 114,724,464,100
5. Step 5: Solve for x
   x = 114,724,464,100/156,778
6. Step 6: Final answer
   x = 731,763.79