Finding the Fourth Proportional to 12,109.37, 18,168.72 and 4,719.07

Step by Step Solution

1. Step 1: Write the proportion equation
   12,109.37 : 18,168.72 = 4,719.07 : x
2. Step 2: Convert to fraction form
   12,109.37/18,168.72 = 4,719.07/x
3. Step 3: Cross multiply
   12,109.37x = 18,168.72 × 4,719.07
4. Step 4: Simplify right side
   12,109.37x = 85,739,347.05
5. Step 5: Solve for x
   x = 85,739,347.05/12,109.37
6. Step 6: Final answer
   x = 7,080.41