Finding the Fourth Proportional to 8,667.66, 11,961.42 and 4,890.98

Step by Step Solution

1. Step 1: Write the proportion equation
   8,667.66 : 11,961.42 = 4,890.98 : x
2. Step 2: Convert to fraction form
   8,667.66/11,961.42 = 4,890.98/x
3. Step 3: Cross multiply
   8,667.66x = 11,961.42 × 4,890.98
4. Step 4: Simplify right side
   8,667.66x = 58,503,105.07
5. Step 5: Solve for x
   x = 58,503,105.07/8,667.66
6. Step 6: Final answer
   x = 6,749.59