Finding the Fourth Proportional to 12,588.86, 17,363.78 and 10,907.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,588.86 : 17,363.78 = 10,907.28 : x
2. Step 2: Convert to fraction form
   12,588.86/17,363.78 = 10,907.28/x
3. Step 3: Cross multiply
   12,588.86x = 17,363.78 × 10,907.28
4. Step 4: Simplify right side
   12,588.86x = 189,391,610.32
5. Step 5: Solve for x
   x = 189,391,610.32/12,588.86
6. Step 6: Final answer
   x = 15,044.38