Finding the Third Proportional to 3,972,484 and 8,421,632

Step by Step Solution

1. Step 1: Write the proportion equation
   3,972,484 : 8,421,632 = 8,421,632 : x
2. Step 2: Convert to fraction form
   3,972,484/8,421,632 = 8,421,632/x
3. Step 3: Cross multiply
   3,972,484x = 8,421,632 × 8,421,632
4. Step 4: Simplify right side
   3,972,484x = 70,923,885,543,424
5. Step 5: Solve for x
   x = 70,923,885,543,424/3,972,484
6. Step 6: Final answer
   x = 17,853,787.59