Finding the Third Proportional to 142,199,991 and 212,368,162.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,199,991 : 212,368,162.50 = 212,368,162.50 : x
2. Step 2: Convert to fraction form
   142,199,991/212,368,162.50 = 212,368,162.50/x
3. Step 3: Cross multiply
   142,199,991x = 212,368,162.50 × 212,368,162.50
4. Step 4: Simplify right side
   142,199,991x = 45,100,236,443,626,408
5. Step 5: Solve for x
   x = 45,100,236,443,626,408/142,199,991
6. Step 6: Final answer
   x = 317,160,613.91