Finding the Fourth Proportional to 12,261.17, 18,388.71 and 3,496.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,261.17 : 18,388.71 = 3,496.16 : x
2. Step 2: Convert to fraction form
   12,261.17/18,388.71 = 3,496.16/x
3. Step 3: Cross multiply
   12,261.17x = 18,388.71 × 3,496.16
4. Step 4: Simplify right side
   12,261.17x = 64,289,780.41
5. Step 5: Solve for x
   x = 64,289,780.41/12,261.17
6. Step 6: Final answer
   x = 5,243.37