Finding the Fourth Proportional to 10,187.39, 14,059.17 and 5,712.57

Step by Step Solution

1. Step 1: Write the proportion equation
   10,187.39 : 14,059.17 = 5,712.57 : x
2. Step 2: Convert to fraction form
   10,187.39/14,059.17 = 5,712.57/x
3. Step 3: Cross multiply
   10,187.39x = 14,059.17 × 5,712.57
4. Step 4: Simplify right side
   10,187.39x = 80,313,992.77
5. Step 5: Solve for x
   x = 80,313,992.77/10,187.39
6. Step 6: Final answer
   x = 7,883.67