Finding the Third Proportional to 12,791,090 and 19,680,671

Step by Step Solution

1. Step 1: Write the proportion equation
   12,791,090 : 19,680,671 = 19,680,671 : x
2. Step 2: Convert to fraction form
   12,791,090/19,680,671 = 19,680,671/x
3. Step 3: Cross multiply
   12,791,090x = 19,680,671 × 19,680,671
4. Step 4: Simplify right side
   12,791,090x = 387,328,811,010,241
5. Step 5: Solve for x
   x = 387,328,811,010,241/12,791,090
6. Step 6: Final answer
   x = 30,281,141.87