Finding the Third Proportional to 1,861,139 and 4,019,386

Step by Step Solution

1. Step 1: Write the proportion equation
   1,861,139 : 4,019,386 = 4,019,386 : x
2. Step 2: Convert to fraction form
   1,861,139/4,019,386 = 4,019,386/x
3. Step 3: Cross multiply
   1,861,139x = 4,019,386 × 4,019,386
4. Step 4: Simplify right side
   1,861,139x = 16,155,463,816,996
5. Step 5: Solve for x
   x = 16,155,463,816,996/1,861,139
6. Step 6: Final answer
   x = 8,680,417.65