Finding the Fourth Proportional to 12,103.17, 18,152.71 and 3,218.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,103.17 : 18,152.71 = 3,218.64 : x
2. Step 2: Convert to fraction form
   12,103.17/18,152.71 = 3,218.64/x
3. Step 3: Cross multiply
   12,103.17x = 18,152.71 × 3,218.64
4. Step 4: Simplify right side
   12,103.17x = 58,426,962.40
5. Step 5: Solve for x
   x = 58,426,962.40/12,103.17
6. Step 6: Final answer
   x = 4,827.41