Finding the Third Proportional to 349,456 and 764,339.50

Step by Step Solution

1. Step 1: Write the proportion equation
   349,456 : 764,339.50 = 764,339.50 : x
2. Step 2: Convert to fraction form
   349,456/764,339.50 = 764,339.50/x
3. Step 3: Cross multiply
   349,456x = 764,339.50 × 764,339.50
4. Step 4: Simplify right side
   349,456x = 584,214,871,260.25
5. Step 5: Solve for x
   x = 584,214,871,260.25/349,456
6. Step 6: Final answer
   x = 1,671,783.78