Finding the Third Proportional to 8,242,408 and 12,608,380

Step by Step Solution

1. Step 1: Write the proportion equation
   8,242,408 : 12,608,380 = 12,608,380 : x
2. Step 2: Convert to fraction form
   8,242,408/12,608,380 = 12,608,380/x
3. Step 3: Cross multiply
   8,242,408x = 12,608,380 × 12,608,380
4. Step 4: Simplify right side
   8,242,408x = 158,971,246,224,400
5. Step 5: Solve for x
   x = 158,971,246,224,400/8,242,408
6. Step 6: Final answer
   x = 19,286,990.67