Finding the Fourth Proportional to 8,661.75, 11,958.77 and 5,435.99

Step by Step Solution

1. Step 1: Write the proportion equation
   8,661.75 : 11,958.77 = 5,435.99 : x
2. Step 2: Convert to fraction form
   8,661.75/11,958.77 = 5,435.99/x
3. Step 3: Cross multiply
   8,661.75x = 11,958.77 × 5,435.99
4. Step 4: Simplify right side
   8,661.75x = 65,007,667.16
5. Step 5: Solve for x
   x = 65,007,667.16/8,661.75
6. Step 6: Final answer
   x = 7,505.14