Finding the Fourth Proportional to 7,111.60, 10,667.48 and 2,181.28

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.60 : 10,667.48 = 2,181.28 : x
2. Step 2: Convert to fraction form
   7,111.60/10,667.48 = 2,181.28/x
3. Step 3: Cross multiply
   7,111.60x = 10,667.48 × 2,181.28
4. Step 4: Simplify right side
   7,111.60x = 23,268,760.77
5. Step 5: Solve for x
   x = 23,268,760.77/7,111.60
6. Step 6: Final answer
   x = 3,271.94