Finding the Third Proportional to 3,980,607 and 8,482,803

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980,607 : 8,482,803 = 8,482,803 : x
2. Step 2: Convert to fraction form
   3,980,607/8,482,803 = 8,482,803/x
3. Step 3: Cross multiply
   3,980,607x = 8,482,803 × 8,482,803
4. Step 4: Simplify right side
   3,980,607x = 71,957,946,736,809
5. Step 5: Solve for x
   x = 71,957,946,736,809/3,980,607
6. Step 6: Final answer
   x = 18,077,129.13