Finding the Fourth Proportional to 12,434.72, 18,638.94 and 4,112.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,434.72 : 18,638.94 = 4,112.60 : x
2. Step 2: Convert to fraction form
   12,434.72/18,638.94 = 4,112.60/x
3. Step 3: Cross multiply
   12,434.72x = 18,638.94 × 4,112.60
4. Step 4: Simplify right side
   12,434.72x = 76,654,504.64
5. Step 5: Solve for x
   x = 76,654,504.64/12,434.72
6. Step 6: Final answer
   x = 6,164.55