Finding the Fourth Proportional to 10,723.36, 14,779.75 and 7,131.89

Step by Step Solution

1. Step 1: Write the proportion equation
   10,723.36 : 14,779.75 = 7,131.89 : x
2. Step 2: Convert to fraction form
   10,723.36/14,779.75 = 7,131.89/x
3. Step 3: Cross multiply
   10,723.36x = 14,779.75 × 7,131.89
4. Step 4: Simplify right side
   10,723.36x = 105,407,597.09
5. Step 5: Solve for x
   x = 105,407,597.09/10,723.36
6. Step 6: Final answer
   x = 9,829.72