Finding the Third Proportional to 5,321,343 and 8,221,385

Step by Step Solution

1. Step 1: Write the proportion equation
   5,321,343 : 8,221,385 = 8,221,385 : x
2. Step 2: Convert to fraction form
   5,321,343/8,221,385 = 8,221,385/x
3. Step 3: Cross multiply
   5,321,343x = 8,221,385 × 8,221,385
4. Step 4: Simplify right side
   5,321,343x = 67,591,171,318,225
5. Step 5: Solve for x
   x = 67,591,171,318,225/5,321,343
6. Step 6: Final answer
   x = 12,701,900.88