Finding the Fourth Proportional to 10,161.15, 14,021.96 and 5,561.89

Step by Step Solution

1. Step 1: Write the proportion equation
   10,161.15 : 14,021.96 = 5,561.89 : x
2. Step 2: Convert to fraction form
   10,161.15/14,021.96 = 5,561.89/x
3. Step 3: Cross multiply
   10,161.15x = 14,021.96 × 5,561.89
4. Step 4: Simplify right side
   10,161.15x = 77,988,606.96
5. Step 5: Solve for x
   x = 77,988,606.96/10,161.15
6. Step 6: Final answer
   x = 7,675.18