Finding the Third Proportional to 3,974,620 and 8,621,376

Step by Step Solution

1. Step 1: Write the proportion equation
   3,974,620 : 8,621,376 = 8,621,376 : x
2. Step 2: Convert to fraction form
   3,974,620/8,621,376 = 8,621,376/x
3. Step 3: Cross multiply
   3,974,620x = 8,621,376 × 8,621,376
4. Step 4: Simplify right side
   3,974,620x = 74,328,124,133,376
5. Step 5: Solve for x
   x = 74,328,124,133,376/3,974,620
6. Step 6: Final answer
   x = 18,700,686.89