Finding the Fourth Proportional to 7,111.18, 10,667.18 and 2,180.87

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.18 : 10,667.18 = 2,180.87 : x
2. Step 2: Convert to fraction form
   7,111.18/10,667.18 = 2,180.87/x
3. Step 3: Cross multiply
   7,111.18x = 10,667.18 × 2,180.87
4. Step 4: Simplify right side
   7,111.18x = 23,263,684.96
5. Step 5: Solve for x
   x = 23,263,684.96/7,111.18
6. Step 6: Final answer
   x = 3,271.43