Finding the Fourth Proportional to 9,697.82, 13,382.87 and 5,720.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,697.82 : 13,382.87 = 5,720.21 : x
2. Step 2: Convert to fraction form
   9,697.82/13,382.87 = 5,720.21/x
3. Step 3: Cross multiply
   9,697.82x = 13,382.87 × 5,720.21
4. Step 4: Simplify right side
   9,697.82x = 76,552,731.29
5. Step 5: Solve for x
   x = 76,552,731.29/9,697.82
6. Step 6: Final answer
   x = 7,893.81