Finding the Third Proportional to 343,260 and 717,889.50

Step by Step Solution

1. Step 1: Write the proportion equation
   343,260 : 717,889.50 = 717,889.50 : x
2. Step 2: Convert to fraction form
   343,260/717,889.50 = 717,889.50/x
3. Step 3: Cross multiply
   343,260x = 717,889.50 × 717,889.50
4. Step 4: Simplify right side
   343,260x = 515,365,334,210.25
5. Step 5: Solve for x
   x = 515,365,334,210.25/343,260
6. Step 6: Final answer
   x = 1,501,384.76