Finding the Third Proportional to 4,386,380 and 9,781,315

Step by Step Solution

1. Step 1: Write the proportion equation
   4,386,380 : 9,781,315 = 9,781,315 : x
2. Step 2: Convert to fraction form
   4,386,380/9,781,315 = 9,781,315/x
3. Step 3: Cross multiply
   4,386,380x = 9,781,315 × 9,781,315
4. Step 4: Simplify right side
   4,386,380x = 95,674,123,129,225
5. Step 5: Solve for x
   x = 95,674,123,129,225/4,386,380
6. Step 6: Final answer
   x = 21,811,635.82