Finding the Third Proportional to 354,645 and 768,271.50

Step by Step Solution

1. Step 1: Write the proportion equation
   354,645 : 768,271.50 = 768,271.50 : x
2. Step 2: Convert to fraction form
   354,645/768,271.50 = 768,271.50/x
3. Step 3: Cross multiply
   354,645x = 768,271.50 × 768,271.50
4. Step 4: Simplify right side
   354,645x = 590,241,097,712.25
5. Step 5: Solve for x
   x = 590,241,097,712.25/354,645
6. Step 6: Final answer
   x = 1,664,315.29