Finding the Third Proportional to 142,812 and 311,017.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,812 : 311,017.50 = 311,017.50 : x
2. Step 2: Convert to fraction form
   142,812/311,017.50 = 311,017.50/x
3. Step 3: Cross multiply
   142,812x = 311,017.50 × 311,017.50
4. Step 4: Simplify right side
   142,812x = 96,731,885,306.25
5. Step 5: Solve for x
   x = 96,731,885,306.25/142,812
6. Step 6: Final answer
   x = 677,337.24