Finding the Fourth Proportional to 12,111.39, 18,163.58 and 4,714.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,111.39 : 18,163.58 = 4,714.20 : x
2. Step 2: Convert to fraction form
   12,111.39/18,163.58 = 4,714.20/x
3. Step 3: Cross multiply
   12,111.39x = 18,163.58 × 4,714.20
4. Step 4: Simplify right side
   12,111.39x = 85,626,725.27
5. Step 5: Solve for x
   x = 85,626,725.27/12,111.39
6. Step 6: Final answer
   x = 7,069.93