Finding the Fourth Proportional to 13,110.23, 18,091.59 and 7,141.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,110.23 : 18,091.59 = 7,141.94 : x
2. Step 2: Convert to fraction form
   13,110.23/18,091.59 = 7,141.94/x
3. Step 3: Cross multiply
   13,110.23x = 18,091.59 × 7,141.94
4. Step 4: Simplify right side
   13,110.23x = 129,209,050.28
5. Step 5: Solve for x
   x = 129,209,050.28/13,110.23
6. Step 6: Final answer
   x = 9,855.59