Finding the Fourth Proportional to 8,085.21, 12,131.94 and 4,758.24

Step by Step Solution

1. Step 1: Write the proportion equation
   8,085.21 : 12,131.94 = 4,758.24 : x
2. Step 2: Convert to fraction form
   8,085.21/12,131.94 = 4,758.24/x
3. Step 3: Cross multiply
   8,085.21x = 12,131.94 × 4,758.24
4. Step 4: Simplify right side
   8,085.21x = 57,726,682.19
5. Step 5: Solve for x
   x = 57,726,682.19/8,085.21
6. Step 6: Final answer
   x = 7,139.79