Finding the Third Proportional to 12,791,172 and 19,680,795

Step by Step Solution

1. Step 1: Write the proportion equation
   12,791,172 : 19,680,795 = 19,680,795 : x
2. Step 2: Convert to fraction form
   12,791,172/19,680,795 = 19,680,795/x
3. Step 3: Cross multiply
   12,791,172x = 19,680,795 × 19,680,795
4. Step 4: Simplify right side
   12,791,172x = 387,333,691,832,025
5. Step 5: Solve for x
   x = 387,333,691,832,025/12,791,172
6. Step 6: Final answer
   x = 30,281,329.33