Finding the Fourth Proportional to 9,789.21, 13,509.18 and 5,812.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,789.21 : 13,509.18 = 5,812.29 : x
2. Step 2: Convert to fraction form
   9,789.21/13,509.18 = 5,812.29/x
3. Step 3: Cross multiply
   9,789.21x = 13,509.18 × 5,812.29
4. Step 4: Simplify right side
   9,789.21x = 78,519,271.82
5. Step 5: Solve for x
   x = 78,519,271.82/9,789.21
6. Step 6: Final answer
   x = 8,021.00