Finding the Third Proportional to 305,857 and 719,615.50

Step by Step Solution

1. Step 1: Write the proportion equation
   305,857 : 719,615.50 = 719,615.50 : x
2. Step 2: Convert to fraction form
   305,857/719,615.50 = 719,615.50/x
3. Step 3: Cross multiply
   305,857x = 719,615.50 × 719,615.50
4. Step 4: Simplify right side
   305,857x = 517,846,467,840.25
5. Step 5: Solve for x
   x = 517,846,467,840.25/305,857
6. Step 6: Final answer
   x = 1,693,099.94