Finding the Third Proportional to 12,791,095 and 19,680,678

Step by Step Solution

1. Step 1: Write the proportion equation
   12,791,095 : 19,680,678 = 19,680,678 : x
2. Step 2: Convert to fraction form
   12,791,095/19,680,678 = 19,680,678/x
3. Step 3: Cross multiply
   12,791,095x = 19,680,678 × 19,680,678
4. Step 4: Simplify right side
   12,791,095x = 387,329,086,539,684
5. Step 5: Solve for x
   x = 387,329,086,539,684/12,791,095
6. Step 6: Final answer
   x = 30,281,151.58