Finding the Third Proportional to 99,905,561,351.50 and 215,734,336,520.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,905,561,351.50 : 215,734,336,520.50 = 215,734,336,520.50 : x
2. Step 2: Convert to fraction form
   99,905,561,351.50/215,734,336,520.50 = 215,734,336,520.50/x
3. Step 3: Cross multiply
   99,905,561,351.50x = 215,734,336,520.50 × 215,734,336,520.50
4. Step 4: Simplify right side
   99,905,561,351.50x = 46,541,303,953,940,337,917,952
5. Step 5: Solve for x
   x = 46,541,303,953,940,337,917,952/99,905,561,351.50
6. Step 6: Final answer
   x = 465,852,984,802.25