Finding the Fourth Proportional to 9,321.57, 12,864.83 and 5,343.39

Step by Step Solution

1. Step 1: Write the proportion equation
   9,321.57 : 12,864.83 = 5,343.39 : x
2. Step 2: Convert to fraction form
   9,321.57/12,864.83 = 5,343.39/x
3. Step 3: Cross multiply
   9,321.57x = 12,864.83 × 5,343.39
4. Step 4: Simplify right side
   9,321.57x = 68,741,777.26
5. Step 5: Solve for x
   x = 68,741,777.26/9,321.57
6. Step 6: Final answer
   x = 7,374.48