Finding the Fourth Proportional to 12,667.05, 18,994.20 and 3,900.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,667.05 : 18,994.20 = 3,900.83 : x
2. Step 2: Convert to fraction form
   12,667.05/18,994.20 = 3,900.83/x
3. Step 3: Cross multiply
   12,667.05x = 18,994.20 × 3,900.83
4. Step 4: Simplify right side
   12,667.05x = 74,093,035.59
5. Step 5: Solve for x
   x = 74,093,035.59/12,667.05
6. Step 6: Final answer
   x = 5,849.27