Finding the Third Proportional to 3,863,304 and 8,390,880

Step by Step Solution

1. Step 1: Write the proportion equation
   3,863,304 : 8,390,880 = 8,390,880 : x
2. Step 2: Convert to fraction form
   3,863,304/8,390,880 = 8,390,880/x
3. Step 3: Cross multiply
   3,863,304x = 8,390,880 × 8,390,880
4. Step 4: Simplify right side
   3,863,304x = 70,406,867,174,400
5. Step 5: Solve for x
   x = 70,406,867,174,400/3,863,304
6. Step 6: Final answer
   x = 18,224,521.59