Finding the Fourth Proportional to 8,615.82, 12,925.55 and 2,772.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,615.82 : 12,925.55 = 2,772.89 : x
2. Step 2: Convert to fraction form
   8,615.82/12,925.55 = 2,772.89/x
3. Step 3: Cross multiply
   8,615.82x = 12,925.55 × 2,772.89
4. Step 4: Simplify right side
   8,615.82x = 35,841,049.85
5. Step 5: Solve for x
   x = 35,841,049.85/8,615.82
6. Step 6: Final answer
   x = 4,159.91