Finding the Fourth Proportional to 11,567.78, 17,349.06 and 5,321.79

Step by Step Solution

1. Step 1: Write the proportion equation
   11,567.78 : 17,349.06 = 5,321.79 : x
2. Step 2: Convert to fraction form
   11,567.78/17,349.06 = 5,321.79/x
3. Step 3: Cross multiply
   11,567.78x = 17,349.06 × 5,321.79
4. Step 4: Simplify right side
   11,567.78x = 92,327,967.27
5. Step 5: Solve for x
   x = 92,327,967.27/11,567.78
6. Step 6: Final answer
   x = 7,981.48