Finding the Fourth Proportional to 12,422.72, 18,634.08 and 3,188

Step by Step Solution

1. Step 1: Write the proportion equation
   12,422.72 : 18,634.08 = 3,188 : x
2. Step 2: Convert to fraction form
   12,422.72/18,634.08 = 3,188/x
3. Step 3: Cross multiply
   12,422.72x = 18,634.08 × 3,188
4. Step 4: Simplify right side
   12,422.72x = 59,405,447.04
5. Step 5: Solve for x
   x = 59,405,447.04/12,422.72
6. Step 6: Final answer
   x = 4,782.00