Finding the Fourth Proportional to 8,590.79, 12,885.56 and 2,667.51

Step by Step Solution

1. Step 1: Write the proportion equation
   8,590.79 : 12,885.56 = 2,667.51 : x
2. Step 2: Convert to fraction form
   8,590.79/12,885.56 = 2,667.51/x
3. Step 3: Cross multiply
   8,590.79x = 12,885.56 × 2,667.51
4. Step 4: Simplify right side
   8,590.79x = 34,372,346.82
5. Step 5: Solve for x
   x = 34,372,346.82/8,590.79
6. Step 6: Final answer
   x = 4,001.07