Finding the Third Proportional to 1,865,430 and 3,986,820

Step by Step Solution

1. Step 1: Write the proportion equation
   1,865,430 : 3,986,820 = 3,986,820 : x
2. Step 2: Convert to fraction form
   1,865,430/3,986,820 = 3,986,820/x
3. Step 3: Cross multiply
   1,865,430x = 3,986,820 × 3,986,820
4. Step 4: Simplify right side
   1,865,430x = 15,894,733,712,400
5. Step 5: Solve for x
   x = 15,894,733,712,400/1,865,430
6. Step 6: Final answer
   x = 8,520,680.87