Finding the Fourth Proportional to 8,730.72, 13,098.96 and 3,185.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,730.72 : 13,098.96 = 3,185.76 : x
2. Step 2: Convert to fraction form
   8,730.72/13,098.96 = 3,185.76/x
3. Step 3: Cross multiply
   8,730.72x = 13,098.96 × 3,185.76
4. Step 4: Simplify right side
   8,730.72x = 41,730,142.81
5. Step 5: Solve for x
   x = 41,730,142.81/8,730.72
6. Step 6: Final answer
   x = 4,779.69