Finding the Fourth Proportional to 9,936.91, 13,711.38 and 5,687.00

Step by Step Solution

1. Step 1: Write the proportion equation
   9,936.91 : 13,711.38 = 5,687.00 : x
2. Step 2: Convert to fraction form
   9,936.91/13,711.38 = 5,687.00/x
3. Step 3: Cross multiply
   9,936.91x = 13,711.38 × 5,687.00
4. Step 4: Simplify right side
   9,936.91x = 77,976,560.17
5. Step 5: Solve for x
   x = 77,976,560.17/9,936.91
6. Step 6: Final answer
   x = 7,847.16