Finding the Third Proportional to 7,980,309 and 12,382,146

Step by Step Solution

1. Step 1: Write the proportion equation
   7,980,309 : 12,382,146 = 12,382,146 : x
2. Step 2: Convert to fraction form
   7,980,309/12,382,146 = 12,382,146/x
3. Step 3: Cross multiply
   7,980,309x = 12,382,146 × 12,382,146
4. Step 4: Simplify right side
   7,980,309x = 153,317,539,565,316
5. Step 5: Solve for x
   x = 153,317,539,565,316/7,980,309
6. Step 6: Final answer
   x = 19,211,980.33