Finding the Third Proportional to 5,919,124 and 12,990,374

Step by Step Solution

1. Step 1: Write the proportion equation
   5,919,124 : 12,990,374 = 12,990,374 : x
2. Step 2: Convert to fraction form
   5,919,124/12,990,374 = 12,990,374/x
3. Step 3: Cross multiply
   5,919,124x = 12,990,374 × 12,990,374
4. Step 4: Simplify right side
   5,919,124x = 168,749,816,659,876
5. Step 5: Solve for x
   x = 168,749,816,659,876/5,919,124
6. Step 6: Final answer
   x = 28,509,255.20