Finding the Third Proportional to 105,819,564 and 215,890,494

Step by Step Solution

1. Step 1: Write the proportion equation
   105,819,564 : 215,890,494 = 215,890,494 : x
2. Step 2: Convert to fraction form
   105,819,564/215,890,494 = 215,890,494/x
3. Step 3: Cross multiply
   105,819,564x = 215,890,494 × 215,890,494
4. Step 4: Simplify right side
   105,819,564x = 46,608,705,399,564,032
5. Step 5: Solve for x
   x = 46,608,705,399,564,032/105,819,564
6. Step 6: Final answer
   x = 440,454,521.24