Finding the Third Proportional to 5,420,158 and 7,980,492

Step by Step Solution

1. Step 1: Write the proportion equation
   5,420,158 : 7,980,492 = 7,980,492 : x
2. Step 2: Convert to fraction form
   5,420,158/7,980,492 = 7,980,492/x
3. Step 3: Cross multiply
   5,420,158x = 7,980,492 × 7,980,492
4. Step 4: Simplify right side
   5,420,158x = 63,688,252,562,064
5. Step 5: Solve for x
   x = 63,688,252,562,064/5,420,158
6. Step 6: Final answer
   x = 11,750,257.57