Finding the Fourth Proportional to 10,142.70, 13,976.98 and 7,755.37

Step by Step Solution

1. Step 1: Write the proportion equation
   10,142.70 : 13,976.98 = 7,755.37 : x
2. Step 2: Convert to fraction form
   10,142.70/13,976.98 = 7,755.37/x
3. Step 3: Cross multiply
   10,142.70x = 13,976.98 × 7,755.37
4. Step 4: Simplify right side
   10,142.70x = 108,396,651.38
5. Step 5: Solve for x
   x = 108,396,651.38/10,142.70
6. Step 6: Final answer
   x = 10,687.16