Finding the Fourth Proportional to 9,699.29, 13,384.43 and 5,720.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,699.29 : 13,384.43 = 5,720.57 : x
2. Step 2: Convert to fraction form
   9,699.29/13,384.43 = 5,720.57/x
3. Step 3: Cross multiply
   9,699.29x = 13,384.43 × 5,720.57
4. Step 4: Simplify right side
   9,699.29x = 76,566,540.12
5. Step 5: Solve for x
   x = 76,566,540.12/9,699.29
6. Step 6: Final answer
   x = 7,894.04