Finding the Fourth Proportional to 11,379.72, 17,077.32 and 3,984.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,379.72 : 17,077.32 = 3,984.12 : x
2. Step 2: Convert to fraction form
   11,379.72/17,077.32 = 3,984.12/x
3. Step 3: Cross multiply
   11,379.72x = 17,077.32 × 3,984.12
4. Step 4: Simplify right side
   11,379.72x = 68,038,092.16
5. Step 5: Solve for x
   x = 68,038,092.16/11,379.72
6. Step 6: Final answer
   x = 5,978.89