Finding the Fourth Proportional to 12,759.81, 17,605.83 and 7,723.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,759.81 : 17,605.83 = 7,723.05 : x
2. Step 2: Convert to fraction form
   12,759.81/17,605.83 = 7,723.05/x
3. Step 3: Cross multiply
   12,759.81x = 17,605.83 × 7,723.05
4. Step 4: Simplify right side
   12,759.81x = 135,970,705.38
5. Step 5: Solve for x
   x = 135,970,705.38/12,759.81
6. Step 6: Final answer
   x = 10,656.17