Finding the Fourth Proportional to 12,667.99, 18,996.51 and 3,900.95

Step by Step Solution

1. Step 1: Write the proportion equation
   12,667.99 : 18,996.51 = 3,900.95 : x
2. Step 2: Convert to fraction form
   12,667.99/18,996.51 = 3,900.95/x
3. Step 3: Cross multiply
   12,667.99x = 18,996.51 × 3,900.95
4. Step 4: Simplify right side
   12,667.99x = 74,104,497.80
5. Step 5: Solve for x
   x = 74,104,497.80/12,667.99
6. Step 6: Final answer
   x = 5,849.75