Finding the Fourth Proportional to 9,789.81, 13,510.04 and 5,313.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,789.81 : 13,510.04 = 5,313.60 : x
2. Step 2: Convert to fraction form
   9,789.81/13,510.04 = 5,313.60/x
3. Step 3: Cross multiply
   9,789.81x = 13,510.04 × 5,313.60
4. Step 4: Simplify right side
   9,789.81x = 71,786,961.83
5. Step 5: Solve for x
   x = 71,786,961.83/9,789.81
6. Step 6: Final answer
   x = 7,332.82