Finding the Fourth Proportional to 12,449.83, 18,678.86 and 4,554.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,449.83 : 18,678.86 = 4,554.76 : x
2. Step 2: Convert to fraction form
   12,449.83/18,678.86 = 4,554.76/x
3. Step 3: Cross multiply
   12,449.83x = 18,678.86 × 4,554.76
4. Step 4: Simplify right side
   12,449.83x = 85,077,724.37
5. Step 5: Solve for x
   x = 85,077,724.37/12,449.83
6. Step 6: Final answer
   x = 6,833.65