Finding the Fourth Proportional to 8,577.82, 12,870.43 and 3,316.53

Step by Step Solution

1. Step 1: Write the proportion equation
   8,577.82 : 12,870.43 = 3,316.53 : x
2. Step 2: Convert to fraction form
   8,577.82/12,870.43 = 3,316.53/x
3. Step 3: Cross multiply
   8,577.82x = 12,870.43 × 3,316.53
4. Step 4: Simplify right side
   8,577.82x = 42,685,195.41
5. Step 5: Solve for x
   x = 42,685,195.41/8,577.82
6. Step 6: Final answer
   x = 4,976.23