Finding the Third Proportional to 319,911 and 740,599.50

Step by Step Solution

1. Step 1: Write the proportion equation
   319,911 : 740,599.50 = 740,599.50 : x
2. Step 2: Convert to fraction form
   319,911/740,599.50 = 740,599.50/x
3. Step 3: Cross multiply
   319,911x = 740,599.50 × 740,599.50
4. Step 4: Simplify right side
   319,911x = 548,487,619,400.25
5. Step 5: Solve for x
   x = 548,487,619,400.25/319,911
6. Step 6: Final answer
   x = 1,714,500.66