Finding the Third Proportional to 666,778 and 1,440,168.50

Step by Step Solution

1. Step 1: Write the proportion equation
   666,778 : 1,440,168.50 = 1,440,168.50 : x
2. Step 2: Convert to fraction form
   666,778/1,440,168.50 = 1,440,168.50/x
3. Step 3: Cross multiply
   666,778x = 1,440,168.50 × 1,440,168.50
4. Step 4: Simplify right side
   666,778x = 2,074,085,308,392.25
5. Step 5: Solve for x
   x = 2,074,085,308,392.25/666,778
6. Step 6: Final answer
   x = 3,110,608.49