Finding the Fourth Proportional to 3,576.81, 5,365.90 and 1,111.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,576.81 : 5,365.90 = 1,111.12 : x
2. Step 2: Convert to fraction form
   3,576.81/5,365.90 = 1,111.12/x
3. Step 3: Cross multiply
   3,576.81x = 5,365.90 × 1,111.12
4. Step 4: Simplify right side
   3,576.81x = 5,962,140.53
5. Step 5: Solve for x
   x = 5,962,140.53/3,576.81
6. Step 6: Final answer
   x = 1,666.89