Finding the Fourth Proportional to 18,991.02, 28,486.61 and 5,843.31

Step by Step Solution

1. Step 1: Write the proportion equation
   18,991.02 : 28,486.61 = 5,843.31 : x
2. Step 2: Convert to fraction form
   18,991.02/28,486.61 = 5,843.31/x
3. Step 3: Cross multiply
   18,991.02x = 28,486.61 × 5,843.31
4. Step 4: Simplify right side
   18,991.02x = 166,456,063.86
5. Step 5: Solve for x
   x = 166,456,063.86/18,991.02
6. Step 6: Final answer
   x = 8,764.99