Finding the Third Proportional to 475,758.50 and 687,388.50

Step by Step Solution

1. Step 1: Write the proportion equation
   475,758.50 : 687,388.50 = 687,388.50 : x
2. Step 2: Convert to fraction form
   475,758.50/687,388.50 = 687,388.50/x
3. Step 3: Cross multiply
   475,758.50x = 687,388.50 × 687,388.50
4. Step 4: Simplify right side
   475,758.50x = 472,502,949,932.25
5. Step 5: Solve for x
   x = 472,502,949,932.25/475,758.50
6. Step 6: Final answer
   x = 993,157.14