Finding the Third Proportional to 311,202 and 681,007.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,202 : 681,007.50 = 681,007.50 : x
2. Step 2: Convert to fraction form
   311,202/681,007.50 = 681,007.50/x
3. Step 3: Cross multiply
   311,202x = 681,007.50 × 681,007.50
4. Step 4: Simplify right side
   311,202x = 463,771,215,056.25
5. Step 5: Solve for x
   x = 463,771,215,056.25/311,202
6. Step 6: Final answer
   x = 1,490,257.82