Finding the Fourth Proportional to 10,985.76, 16,479.18 and 3,590.33

Step by Step Solution

1. Step 1: Write the proportion equation
   10,985.76 : 16,479.18 = 3,590.33 : x
2. Step 2: Convert to fraction form
   10,985.76/16,479.18 = 3,590.33/x
3. Step 3: Cross multiply
   10,985.76x = 16,479.18 × 3,590.33
4. Step 4: Simplify right side
   10,985.76x = 59,165,611.93
5. Step 5: Solve for x
   x = 59,165,611.93/10,985.76
6. Step 6: Final answer
   x = 5,385.66