Finding the Fourth Proportional to 12,075.81, 18,111.63 and 3,191.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,075.81 : 18,111.63 = 3,191.23 : x
2. Step 2: Convert to fraction form
   12,075.81/18,111.63 = 3,191.23/x
3. Step 3: Cross multiply
   12,075.81x = 18,111.63 × 3,191.23
4. Step 4: Simplify right side
   12,075.81x = 57,798,377.00
5. Step 5: Solve for x
   x = 57,798,377.00/12,075.81
6. Step 6: Final answer
   x = 4,786.29