Finding the Fourth Proportional to 12,421.89, 17,141.98 and 6,756.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,421.89 : 17,141.98 = 6,756.54 : x
2. Step 2: Convert to fraction form
   12,421.89/17,141.98 = 6,756.54/x
3. Step 3: Cross multiply
   12,421.89x = 17,141.98 × 6,756.54
4. Step 4: Simplify right side
   12,421.89x = 115,820,453.26
5. Step 5: Solve for x
   x = 115,820,453.26/12,421.89
6. Step 6: Final answer
   x = 9,323.90