Finding the Fourth Proportional to 12,667.05, 18,995.11 and 3,900.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,667.05 : 18,995.11 = 3,900.02 : x
2. Step 2: Convert to fraction form
   12,667.05/18,995.11 = 3,900.02/x
3. Step 3: Cross multiply
   12,667.05x = 18,995.11 × 3,900.02
4. Step 4: Simplify right side
   12,667.05x = 74,081,204.18
5. Step 5: Solve for x
   x = 74,081,204.18/12,667.05
6. Step 6: Final answer
   x = 5,848.34