Finding the Fourth Proportional to 12,667.58, 18,977.17 and 7,104.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,667.58 : 18,977.17 = 7,104.09 : x
2. Step 2: Convert to fraction form
   12,667.58/18,977.17 = 7,104.09/x
3. Step 3: Cross multiply
   12,667.58x = 18,977.17 × 7,104.09
4. Step 4: Simplify right side
   12,667.58x = 134,815,523.63
5. Step 5: Solve for x
   x = 134,815,523.63/12,667.58
6. Step 6: Final answer
   x = 10,642.56