Finding the Third Proportional to 5,409,479 and 8,424,410

Step by Step Solution

1. Step 1: Write the proportion equation
   5,409,479 : 8,424,410 = 8,424,410 : x
2. Step 2: Convert to fraction form
   5,409,479/8,424,410 = 8,424,410/x
3. Step 3: Cross multiply
   5,409,479x = 8,424,410 × 8,424,410
4. Step 4: Simplify right side
   5,409,479x = 70,970,683,848,100
5. Step 5: Solve for x
   x = 70,970,683,848,100/5,409,479
6. Step 6: Final answer
   x = 13,119,689.32