Finding the Fourth Proportional to 13,072.10, 18,037.05 and 7,768.22

Step by Step Solution

1. Step 1: Write the proportion equation
   13,072.10 : 18,037.05 = 7,768.22 : x
2. Step 2: Convert to fraction form
   13,072.10/18,037.05 = 7,768.22/x
3. Step 3: Cross multiply
   13,072.10x = 18,037.05 × 7,768.22
4. Step 4: Simplify right side
   13,072.10x = 140,115,772.55
5. Step 5: Solve for x
   x = 140,115,772.55/13,072.10
6. Step 6: Final answer
   x = 10,718.69