Finding the Third Proportional to 13,971,408 and 20,870,840

Step by Step Solution

1. Step 1: Write the proportion equation
   13,971,408 : 20,870,840 = 20,870,840 : x
2. Step 2: Convert to fraction form
   13,971,408/20,870,840 = 20,870,840/x
3. Step 3: Cross multiply
   13,971,408x = 20,870,840 × 20,870,840
4. Step 4: Simplify right side
   13,971,408x = 435,591,962,305,600
5. Step 5: Solve for x
   x = 435,591,962,305,600/13,971,408
6. Step 6: Final answer
   x = 31,177,384.72