Finding the Fourth Proportional to 13,751,919, 18,978,238.71 and 7,640,347.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,751,919 : 18,978,238.71 = 7,640,347.50 : x
2. Step 2: Convert to fraction form
   13,751,919/18,978,238.71 = 7,640,347.50/x
3. Step 3: Cross multiply
   13,751,919x = 18,978,238.71 × 7,640,347.50
4. Step 4: Simplify right side
   13,751,919x = 145,000,338,682,351.72
5. Step 5: Solve for x
   x = 145,000,338,682,351.72/13,751,919
6. Step 6: Final answer
   x = 10,544,007.62