Finding the Third Proportional to 4,019,390 and 8,736,892

Step by Step Solution

1. Step 1: Write the proportion equation
   4,019,390 : 8,736,892 = 8,736,892 : x
2. Step 2: Convert to fraction form
   4,019,390/8,736,892 = 8,736,892/x
3. Step 3: Cross multiply
   4,019,390x = 8,736,892 × 8,736,892
4. Step 4: Simplify right side
   4,019,390x = 76,333,281,819,664
5. Step 5: Solve for x
   x = 76,333,281,819,664/4,019,390
6. Step 6: Final answer
   x = 18,991,260.32