Finding the Fourth Proportional to 12,677.63, 19,003.68 and 5,286.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,677.63 : 19,003.68 = 5,286.17 : x
2. Step 2: Convert to fraction form
   12,677.63/19,003.68 = 5,286.17/x
3. Step 3: Cross multiply
   12,677.63x = 19,003.68 × 5,286.17
4. Step 4: Simplify right side
   12,677.63x = 100,456,730.61
5. Step 5: Solve for x
   x = 100,456,730.61/12,677.63
6. Step 6: Final answer
   x = 7,923.94