Finding the Fourth Proportional to 13,091.41, 18,066.06 and 7,123.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,091.41 : 18,066.06 = 7,123.10 : x
2. Step 2: Convert to fraction form
   13,091.41/18,066.06 = 7,123.10/x
3. Step 3: Cross multiply
   13,091.41x = 18,066.06 × 7,123.10
4. Step 4: Simplify right side
   13,091.41x = 128,686,408.72
5. Step 5: Solve for x
   x = 128,686,408.72/13,091.41
6. Step 6: Final answer
   x = 9,829.84