Finding the Fourth Proportional to 8,131.51, 12,189.16 and 5,666.95

Step by Step Solution

1. Step 1: Write the proportion equation
   8,131.51 : 12,189.16 = 5,666.95 : x
2. Step 2: Convert to fraction form
   8,131.51/12,189.16 = 5,666.95/x
3. Step 3: Cross multiply
   8,131.51x = 12,189.16 × 5,666.95
4. Step 4: Simplify right side
   8,131.51x = 69,075,360.26
5. Step 5: Solve for x
   x = 69,075,360.26/8,131.51
6. Step 6: Final answer
   x = 8,494.78