Finding the Fourth Proportional to 12,188.68, 18,279.39 and 5,168.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,188.68 : 18,279.39 = 5,168.59 : x
2. Step 2: Convert to fraction form
   12,188.68/18,279.39 = 5,168.59/x
3. Step 3: Cross multiply
   12,188.68x = 18,279.39 × 5,168.59
4. Step 4: Simplify right side
   12,188.68x = 94,478,646.04
5. Step 5: Solve for x
   x = 94,478,646.04/12,188.68
6. Step 6: Final answer
   x = 7,751.35