Finding the Third Proportional to 3,964,224 and 8,488,128

Step by Step Solution

1. Step 1: Write the proportion equation
   3,964,224 : 8,488,128 = 8,488,128 : x
2. Step 2: Convert to fraction form
   3,964,224/8,488,128 = 8,488,128/x
3. Step 3: Cross multiply
   3,964,224x = 8,488,128 × 8,488,128
4. Step 4: Simplify right side
   3,964,224x = 72,048,316,944,384
5. Step 5: Solve for x
   x = 72,048,316,944,384/3,964,224
6. Step 6: Final answer
   x = 18,174,633.16