Finding the Third Proportional to 105,819,561 and 215,890,488

Step by Step Solution

1. Step 1: Write the proportion equation
   105,819,561 : 215,890,488 = 215,890,488 : x
2. Step 2: Convert to fraction form
   105,819,561/215,890,488 = 215,890,488/x
3. Step 3: Cross multiply
   105,819,561x = 215,890,488 × 215,890,488
4. Step 4: Simplify right side
   105,819,561x = 46,608,702,808,878,144
5. Step 5: Solve for x
   x = 46,608,702,808,878,144/105,819,561
6. Step 6: Final answer
   x = 440,454,509.25