Finding the Fourth Proportional to 9,321.31, 12,863.94 and 5,343.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,321.31 : 12,863.94 = 5,343.09 : x
2. Step 2: Convert to fraction form
   9,321.31/12,863.94 = 5,343.09/x
3. Step 3: Cross multiply
   9,321.31x = 12,863.94 × 5,343.09
4. Step 4: Simplify right side
   9,321.31x = 68,733,189.17
5. Step 5: Solve for x
   x = 68,733,189.17/9,321.31
6. Step 6: Final answer
   x = 7,373.77