Finding the Fourth Proportional to 12,131.18, 18,196.80 and 3,697.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,131.18 : 18,196.80 = 3,697.76 : x
2. Step 2: Convert to fraction form
   12,131.18/18,196.80 = 3,697.76/x
3. Step 3: Cross multiply
   12,131.18x = 18,196.80 × 3,697.76
4. Step 4: Simplify right side
   12,131.18x = 67,287,399.17
5. Step 5: Solve for x
   x = 67,287,399.17/12,131.18
6. Step 6: Final answer
   x = 5,546.65