Finding the Third Proportional to 311,875.50 and 683,415

Step by Step Solution

1. Step 1: Write the proportion equation
   311,875.50 : 683,415 = 683,415 : x
2. Step 2: Convert to fraction form
   311,875.50/683,415 = 683,415/x
3. Step 3: Cross multiply
   311,875.50x = 683,415 × 683,415
4. Step 4: Simplify right side
   311,875.50x = 467,056,062,225
5. Step 5: Solve for x
   x = 467,056,062,225/311,875.50
6. Step 6: Final answer
   x = 1,497,572.15