Finding the Fourth Proportional to 11,667.98, 17,505.45 and 5,431.68

Step by Step Solution

1. Step 1: Write the proportion equation
   11,667.98 : 17,505.45 = 5,431.68 : x
2. Step 2: Convert to fraction form
   11,667.98/17,505.45 = 5,431.68/x
3. Step 3: Cross multiply
   11,667.98x = 17,505.45 × 5,431.68
4. Step 4: Simplify right side
   11,667.98x = 95,084,002.66
5. Step 5: Solve for x
   x = 95,084,002.66/11,667.98
6. Step 6: Final answer
   x = 8,149.14