Finding the Fourth Proportional to 8,667.13, 12,992.72 and 4,712.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,667.13 : 12,992.72 = 4,712.61 : x
2. Step 2: Convert to fraction form
   8,667.13/12,992.72 = 4,712.61/x
3. Step 3: Cross multiply
   8,667.13x = 12,992.72 × 4,712.61
4. Step 4: Simplify right side
   8,667.13x = 61,229,616.31
5. Step 5: Solve for x
   x = 61,229,616.31/8,667.13
6. Step 6: Final answer
   x = 7,064.58