Finding the Third Proportional to 142,116,400 and 310,978,676

Step by Step Solution

1. Step 1: Write the proportion equation
   142,116,400 : 310,978,676 = 310,978,676 : x
2. Step 2: Convert to fraction form
   142,116,400/310,978,676 = 310,978,676/x
3. Step 3: Cross multiply
   142,116,400x = 310,978,676 × 310,978,676
4. Step 4: Simplify right side
   142,116,400x = 96,707,736,926,712,976
5. Step 5: Solve for x
   x = 96,707,736,926,712,976/142,116,400
6. Step 6: Final answer
   x = 680,482,596.85