Finding the Fourth Proportional to 5,777.81, 8,661.25 and 3,558.01

Step by Step Solution

1. Step 1: Write the proportion equation
   5,777.81 : 8,661.25 = 3,558.01 : x
2. Step 2: Convert to fraction form
   5,777.81/8,661.25 = 3,558.01/x
3. Step 3: Cross multiply
   5,777.81x = 8,661.25 × 3,558.01
4. Step 4: Simplify right side
   5,777.81x = 30,816,761.91
5. Step 5: Solve for x
   x = 30,816,761.91/5,777.81
6. Step 6: Final answer
   x = 5,333.64