Finding the Fourth Proportional to 12,131.31, 18,190.89 and 3,811.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,131.31 : 18,190.89 = 3,811.22 : x
2. Step 2: Convert to fraction form
   12,131.31/18,190.89 = 3,811.22/x
3. Step 3: Cross multiply
   12,131.31x = 18,190.89 × 3,811.22
4. Step 4: Simplify right side
   12,131.31x = 69,329,392.83
5. Step 5: Solve for x
   x = 69,329,392.83/12,131.31
6. Step 6: Final answer
   x = 5,714.91