Finding the Fourth Proportional to 7,111.18, 10,666.47 and 2,180.56

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.18 : 10,666.47 = 2,180.56 : x
2. Step 2: Convert to fraction form
   7,111.18/10,666.47 = 2,180.56/x
3. Step 3: Cross multiply
   7,111.18x = 10,666.47 × 2,180.56
4. Step 4: Simplify right side
   7,111.18x = 23,258,877.82
5. Step 5: Solve for x
   x = 23,258,877.82/7,111.18
6. Step 6: Final answer
   x = 3,270.75