Finding the Third Proportional to 3,890,400 and 8,453,572

Step by Step Solution

1. Step 1: Write the proportion equation
   3,890,400 : 8,453,572 = 8,453,572 : x
2. Step 2: Convert to fraction form
   3,890,400/8,453,572 = 8,453,572/x
3. Step 3: Cross multiply
   3,890,400x = 8,453,572 × 8,453,572
4. Step 4: Simplify right side
   3,890,400x = 71,462,879,559,184
5. Step 5: Solve for x
   x = 71,462,879,559,184/3,890,400
6. Step 6: Final answer
   x = 18,369,031.35