Finding the Fourth Proportional to 11,680.17, 17,523.30 and 3,889.05

Step by Step Solution

1. Step 1: Write the proportion equation
   11,680.17 : 17,523.30 = 3,889.05 : x
2. Step 2: Convert to fraction form
   11,680.17/17,523.30 = 3,889.05/x
3. Step 3: Cross multiply
   11,680.17x = 17,523.30 × 3,889.05
4. Step 4: Simplify right side
   11,680.17x = 68,148,989.87
5. Step 5: Solve for x
   x = 68,148,989.87/11,680.17
6. Step 6: Final answer
   x = 5,834.59