Finding the Fourth Proportional to 10,428.74, 14,391.72 and 5,713.46

Step by Step Solution

1. Step 1: Write the proportion equation
   10,428.74 : 14,391.72 = 5,713.46 : x
2. Step 2: Convert to fraction form
   10,428.74/14,391.72 = 5,713.46/x
3. Step 3: Cross multiply
   10,428.74x = 14,391.72 × 5,713.46
4. Step 4: Simplify right side
   10,428.74x = 82,226,444.59
5. Step 5: Solve for x
   x = 82,226,444.59/10,428.74
6. Step 6: Final answer
   x = 7,884.60