Finding the Fourth Proportional to 3,498.30, 4,827.42 and 2,172.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,498.30 : 4,827.42 = 2,172.15 : x
2. Step 2: Convert to fraction form
   3,498.30/4,827.42 = 2,172.15/x
3. Step 3: Cross multiply
   3,498.30x = 4,827.42 × 2,172.15
4. Step 4: Simplify right side
   3,498.30x = 10,485,880.35
5. Step 5: Solve for x
   x = 10,485,880.35/3,498.30
6. Step 6: Final answer
   x = 2,997.42