Finding the Fourth Proportional to 12,894.48, 19,308.90 and 8,498.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,894.48 : 19,308.90 = 8,498.61 : x
2. Step 2: Convert to fraction form
   12,894.48/19,308.90 = 8,498.61/x
3. Step 3: Cross multiply
   12,894.48x = 19,308.90 × 8,498.61
4. Step 4: Simplify right side
   12,894.48x = 164,098,858.90
5. Step 5: Solve for x
   x = 164,098,858.90/12,894.48
6. Step 6: Final answer
   x = 12,726.28