Finding the Third Proportional to 319,915.50 and 740,618

Step by Step Solution

1. Step 1: Write the proportion equation
   319,915.50 : 740,618 = 740,618 : x
2. Step 2: Convert to fraction form
   319,915.50/740,618 = 740,618/x
3. Step 3: Cross multiply
   319,915.50x = 740,618 × 740,618
4. Step 4: Simplify right side
   319,915.50x = 548,515,021,924
5. Step 5: Solve for x
   x = 548,515,021,924/319,915.50
6. Step 6: Final answer
   x = 1,714,562.20