Finding the Third Proportional to 12,791,087 and 19,680,665

Step by Step Solution

1. Step 1: Write the proportion equation
   12,791,087 : 19,680,665 = 19,680,665 : x
2. Step 2: Convert to fraction form
   12,791,087/19,680,665 = 19,680,665/x
3. Step 3: Cross multiply
   12,791,087x = 19,680,665 × 19,680,665
4. Step 4: Simplify right side
   12,791,087x = 387,328,574,842,225
5. Step 5: Solve for x
   x = 387,328,574,842,225/12,791,087
6. Step 6: Final answer
   x = 30,281,130.51