Finding the Third Proportional to 111,917,907 and 263,817,990

Step by Step Solution

1. Step 1: Write the proportion equation
   111,917,907 : 263,817,990 = 263,817,990 : x
2. Step 2: Convert to fraction form
   111,917,907/263,817,990 = 263,817,990/x
3. Step 3: Cross multiply
   111,917,907x = 263,817,990 × 263,817,990
4. Step 4: Simplify right side
   111,917,907x = 69,599,931,847,640,096
5. Step 5: Solve for x
   x = 69,599,931,847,640,096/111,917,907
6. Step 6: Final answer
   x = 621,883,787.08