Finding the Third Proportional to 3,643,990 and 7,974,428

Step by Step Solution

1. Step 1: Write the proportion equation
   3,643,990 : 7,974,428 = 7,974,428 : x
2. Step 2: Convert to fraction form
   3,643,990/7,974,428 = 7,974,428/x
3. Step 3: Cross multiply
   3,643,990x = 7,974,428 × 7,974,428
4. Step 4: Simplify right side
   3,643,990x = 63,591,501,927,184
5. Step 5: Solve for x
   x = 63,591,501,927,184/3,643,990
6. Step 6: Final answer
   x = 17,451,063.79