Finding the Third Proportional to 5,249,732 and 7,980,780

Step by Step Solution

1. Step 1: Write the proportion equation
   5,249,732 : 7,980,780 = 7,980,780 : x
2. Step 2: Convert to fraction form
   5,249,732/7,980,780 = 7,980,780/x
3. Step 3: Cross multiply
   5,249,732x = 7,980,780 × 7,980,780
4. Step 4: Simplify right side
   5,249,732x = 63,692,849,408,400
5. Step 5: Solve for x
   x = 63,692,849,408,400/5,249,732
6. Step 6: Final answer
   x = 12,132,590.66