Finding the Third Proportional to 311,283 and 680,230.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,283 : 680,230.50 = 680,230.50 : x
2. Step 2: Convert to fraction form
   311,283/680,230.50 = 680,230.50/x
3. Step 3: Cross multiply
   311,283x = 680,230.50 × 680,230.50
4. Step 4: Simplify right side
   311,283x = 462,713,533,130.25
5. Step 5: Solve for x
   x = 462,713,533,130.25/311,283
6. Step 6: Final answer
   x = 1,486,472.22