Finding the Fourth Proportional to 8,569.31, 12,853.62 and 2,645.96

Step by Step Solution

1. Step 1: Write the proportion equation
   8,569.31 : 12,853.62 = 2,645.96 : x
2. Step 2: Convert to fraction form
   8,569.31/12,853.62 = 2,645.96/x
3. Step 3: Cross multiply
   8,569.31x = 12,853.62 × 2,645.96
4. Step 4: Simplify right side
   8,569.31x = 34,010,100.11
5. Step 5: Solve for x
   x = 34,010,100.11/8,569.31
6. Step 6: Final answer
   x = 3,968.82