Finding the Fourth Proportional to 13,077.30, 18,049.27 and 7,771.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,077.30 : 18,049.27 = 7,771.09 : x
2. Step 2: Convert to fraction form
   13,077.30/18,049.27 = 7,771.09/x
3. Step 3: Cross multiply
   13,077.30x = 18,049.27 × 7,771.09
4. Step 4: Simplify right side
   13,077.30x = 140,262,411.36
5. Step 5: Solve for x
   x = 140,262,411.36/13,077.30
6. Step 6: Final answer
   x = 10,725.64