Finding the Fourth Proportional to 10,428.82, 14,391.80 and 5,713.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,428.82 : 14,391.80 = 5,713.12 : x
2. Step 2: Convert to fraction form
   10,428.82/14,391.80 = 5,713.12/x
3. Step 3: Cross multiply
   10,428.82x = 14,391.80 × 5,713.12
4. Step 4: Simplify right side
   10,428.82x = 82,222,080.42
5. Step 5: Solve for x
   x = 82,222,080.42/10,428.82
6. Step 6: Final answer
   x = 7,884.12