Finding the Fourth Proportional to 11,685.33, 17,521.52 and 3,889.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,685.33 : 17,521.52 = 3,889.89 : x
2. Step 2: Convert to fraction form
   11,685.33/17,521.52 = 3,889.89/x
3. Step 3: Cross multiply
   11,685.33x = 17,521.52 × 3,889.89
4. Step 4: Simplify right side
   11,685.33x = 68,156,765.98
5. Step 5: Solve for x
   x = 68,156,765.98/11,685.33
6. Step 6: Final answer
   x = 5,832.68