Finding the Fourth Proportional to 8,591.72, 12,889.86 and 2,748.44

Step by Step Solution

1. Step 1: Write the proportion equation
   8,591.72 : 12,889.86 = 2,748.44 : x
2. Step 2: Convert to fraction form
   8,591.72/12,889.86 = 2,748.44/x
3. Step 3: Cross multiply
   8,591.72x = 12,889.86 × 2,748.44
4. Step 4: Simplify right side
   8,591.72x = 35,427,006.82
5. Step 5: Solve for x
   x = 35,427,006.82/8,591.72
6. Step 6: Final answer
   x = 4,123.39