Finding the Third Proportional to 111,917,916 and 263,818,012.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,917,916 : 263,818,012.50 = 263,818,012.50 : x
2. Step 2: Convert to fraction form
   111,917,916/263,818,012.50 = 263,818,012.50/x
3. Step 3: Cross multiply
   111,917,916x = 263,818,012.50 × 263,818,012.50
4. Step 4: Simplify right side
   111,917,916x = 69,599,943,719,450,160
5. Step 5: Solve for x
   x = 69,599,943,719,450,160/111,917,916
6. Step 6: Final answer
   x = 621,883,843.15