Finding the Fourth Proportional to 13,608.24, 18,779.86 and 7,946.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,608.24 : 18,779.86 = 7,946.61 : x
2. Step 2: Convert to fraction form
   13,608.24/18,779.86 = 7,946.61/x
3. Step 3: Cross multiply
   13,608.24x = 18,779.86 × 7,946.61
4. Step 4: Simplify right side
   13,608.24x = 149,236,223.27
5. Step 5: Solve for x
   x = 149,236,223.27/13,608.24
6. Step 6: Final answer
   x = 10,966.61