Finding the Fourth Proportional to 12,570.94, 17,317.98 and 8,787.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,570.94 : 17,317.98 = 8,787.09 : x
2. Step 2: Convert to fraction form
   12,570.94/17,317.98 = 8,787.09/x
3. Step 3: Cross multiply
   12,570.94x = 17,317.98 × 8,787.09
4. Step 4: Simplify right side
   12,570.94x = 152,174,648.88
5. Step 5: Solve for x
   x = 152,174,648.88/12,570.94
6. Step 6: Final answer
   x = 12,105.27