Finding the Fourth Proportional to 21,682,399.69, 29,928,411.69 and 13,947,442.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,682,399.69 : 29,928,411.69 = 13,947,442.02 : x
2. Step 2: Convert to fraction form
   21,682,399.69/29,928,411.69 = 13,947,442.02/x
3. Step 3: Cross multiply
   21,682,399.69x = 29,928,411.69 × 13,947,442.02
4. Step 4: Simplify right side
   21,682,399.69x = 417,424,786,796,965.25
5. Step 5: Solve for x
   x = 417,424,786,796,965.25/21,682,399.69
6. Step 6: Final answer
   x = 19,251,779.91