Finding the Fourth Proportional to 11,680.34, 17,520.69 and 3,889.16

Step by Step Solution

1. Step 1: Write the proportion equation
   11,680.34 : 17,520.69 = 3,889.16 : x
2. Step 2: Convert to fraction form
   11,680.34/17,520.69 = 3,889.16/x
3. Step 3: Cross multiply
   11,680.34x = 17,520.69 × 3,889.16
4. Step 4: Simplify right side
   11,680.34x = 68,140,766.72
5. Step 5: Solve for x
   x = 68,140,766.72/11,680.34
6. Step 6: Final answer
   x = 5,833.80