Finding the Fourth Proportional to 14,431.23, 21,645.43 and 7,040.79

Step by Step Solution

1. Step 1: Write the proportion equation
   14,431.23 : 21,645.43 = 7,040.79 : x
2. Step 2: Convert to fraction form
   14,431.23/21,645.43 = 7,040.79/x
3. Step 3: Cross multiply
   14,431.23x = 21,645.43 × 7,040.79
4. Step 4: Simplify right side
   14,431.23x = 152,400,891.89
5. Step 5: Solve for x
   x = 152,400,891.89/14,431.23
6. Step 6: Final answer
   x = 10,560.49