Finding the Third Proportional to 311,869.50 and 683,403

Step by Step Solution

1. Step 1: Write the proportion equation
   311,869.50 : 683,403 = 683,403 : x
2. Step 2: Convert to fraction form
   311,869.50/683,403 = 683,403/x
3. Step 3: Cross multiply
   311,869.50x = 683,403 × 683,403
4. Step 4: Simplify right side
   311,869.50x = 467,039,660,409
5. Step 5: Solve for x
   x = 467,039,660,409/311,869.50
6. Step 6: Final answer
   x = 1,497,548.37