Finding the Third Proportional to 142,116,402 and 310,978,680

Step by Step Solution

1. Step 1: Write the proportion equation
   142,116,402 : 310,978,680 = 310,978,680 : x
2. Step 2: Convert to fraction form
   142,116,402/310,978,680 = 310,978,680/x
3. Step 3: Cross multiply
   142,116,402x = 310,978,680 × 310,978,680
4. Step 4: Simplify right side
   142,116,402x = 96,707,739,414,542,400
5. Step 5: Solve for x
   x = 96,707,739,414,542,400/142,116,402
6. Step 6: Final answer
   x = 680,482,604.78