Finding the Fourth Proportional to 5,142.82, 7,713.98 and 1,811.23

Step by Step Solution

1. Step 1: Write the proportion equation
   5,142.82 : 7,713.98 = 1,811.23 : x
2. Step 2: Convert to fraction form
   5,142.82/7,713.98 = 1,811.23/x
3. Step 3: Cross multiply
   5,142.82x = 7,713.98 × 1,811.23
4. Step 4: Simplify right side
   5,142.82x = 13,971,819.59
5. Step 5: Solve for x
   x = 13,971,819.59/5,142.82
6. Step 6: Final answer
   x = 2,716.76