Finding the Fourth Proportional to 12,321.31, 18,495.11 and 5,304.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,321.31 : 18,495.11 = 5,304.80 : x
2. Step 2: Convert to fraction form
   12,321.31/18,495.11 = 5,304.80/x
3. Step 3: Cross multiply
   12,321.31x = 18,495.11 × 5,304.80
4. Step 4: Simplify right side
   12,321.31x = 98,112,780.31
5. Step 5: Solve for x
   x = 98,112,780.31/12,321.31
6. Step 6: Final answer
   x = 7,962.85