Finding the Fourth Proportional to 8,484.81, 12,728.43 and 2,641.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,484.81 : 12,728.43 = 2,641.89 : x
2. Step 2: Convert to fraction form
   8,484.81/12,728.43 = 2,641.89/x
3. Step 3: Cross multiply
   8,484.81x = 12,728.43 × 2,641.89
4. Step 4: Simplify right side
   8,484.81x = 33,627,111.93
5. Step 5: Solve for x
   x = 33,627,111.93/8,484.81
6. Step 6: Final answer
   x = 3,963.21