Finding the Third Proportional to 361,128 and 768,910.50

Step by Step Solution

1. Step 1: Write the proportion equation
   361,128 : 768,910.50 = 768,910.50 : x
2. Step 2: Convert to fraction form
   361,128/768,910.50 = 768,910.50/x
3. Step 3: Cross multiply
   361,128x = 768,910.50 × 768,910.50
4. Step 4: Simplify right side
   361,128x = 591,223,357,010.25
5. Step 5: Solve for x
   x = 591,223,357,010.25/361,128
6. Step 6: Final answer
   x = 1,637,157.34