Finding the Fourth Proportional to 12,181.50, 18,272.34 and 2,947.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,181.50 : 18,272.34 = 2,947.50 : x
2. Step 2: Convert to fraction form
   12,181.50/18,272.34 = 2,947.50/x
3. Step 3: Cross multiply
   12,181.50x = 18,272.34 × 2,947.50
4. Step 4: Simplify right side
   12,181.50x = 53,857,722.15
5. Step 5: Solve for x
   x = 53,857,722.15/12,181.50
6. Step 6: Final answer
   x = 4,421.27