Finding the Third Proportional to 5,981,387 and 13,120,780

Step by Step Solution

1. Step 1: Write the proportion equation
   5,981,387 : 13,120,780 = 13,120,780 : x
2. Step 2: Convert to fraction form
   5,981,387/13,120,780 = 13,120,780/x
3. Step 3: Cross multiply
   5,981,387x = 13,120,780 × 13,120,780
4. Step 4: Simplify right side
   5,981,387x = 172,154,867,808,400
5. Step 5: Solve for x
   x = 172,154,867,808,400/5,981,387
6. Step 6: Final answer
   x = 28,781,763.80