Finding the Fourth Proportional to 19,116.41, 28,678.71 and 6,636.83

Step by Step Solution

1. Step 1: Write the proportion equation
   19,116.41 : 28,678.71 = 6,636.83 : x
2. Step 2: Convert to fraction form
   19,116.41/28,678.71 = 6,636.83/x
3. Step 3: Cross multiply
   19,116.41x = 28,678.71 × 6,636.83
4. Step 4: Simplify right side
   19,116.41x = 190,335,722.89
5. Step 5: Solve for x
   x = 190,335,722.89/19,116.41
6. Step 6: Final answer
   x = 9,956.67