Finding the Fourth Proportional to 12,621.61, 17,417.61 and 7,243.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,621.61 : 17,417.61 = 7,243.83 : x
2. Step 2: Convert to fraction form
   12,621.61/17,417.61 = 7,243.83/x
3. Step 3: Cross multiply
   12,621.61x = 17,417.61 × 7,243.83
4. Step 4: Simplify right side
   12,621.61x = 126,170,205.85
5. Step 5: Solve for x
   x = 126,170,205.85/12,621.61
6. Step 6: Final answer
   x = 9,996.36