Finding the Fourth Proportional to 12,124.32, 18,186.72 and 5,198.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,124.32 : 18,186.72 = 5,198.88 : x
2. Step 2: Convert to fraction form
   12,124.32/18,186.72 = 5,198.88/x
3. Step 3: Cross multiply
   12,124.32x = 18,186.72 × 5,198.88
4. Step 4: Simplify right side
   12,124.32x = 94,550,574.87
5. Step 5: Solve for x
   x = 94,550,574.87/12,124.32
6. Step 6: Final answer
   x = 7,798.42