Finding the Third Proportional to 315,475 and 688,044.50

Step by Step Solution

1. Step 1: Write the proportion equation
   315,475 : 688,044.50 = 688,044.50 : x
2. Step 2: Convert to fraction form
   315,475/688,044.50 = 688,044.50/x
3. Step 3: Cross multiply
   315,475x = 688,044.50 × 688,044.50
4. Step 4: Simplify right side
   315,475x = 473,405,233,980.25
5. Step 5: Solve for x
   x = 473,405,233,980.25/315,475
6. Step 6: Final answer
   x = 1,500,610.93