Finding the Fourth Proportional to 13,091.10, 18,065.82 and 7,122.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,091.10 : 18,065.82 = 7,122.69 : x
2. Step 2: Convert to fraction form
   13,091.10/18,065.82 = 7,122.69/x
3. Step 3: Cross multiply
   13,091.10x = 18,065.82 × 7,122.69
4. Step 4: Simplify right side
   13,091.10x = 128,677,235.46
5. Step 5: Solve for x
   x = 128,677,235.46/13,091.10
6. Step 6: Final answer
   x = 9,829.37