Finding the Fourth Proportional to 11,064.47, 16,590.59 and 4,394.21

Step by Step Solution

1. Step 1: Write the proportion equation
   11,064.47 : 16,590.59 = 4,394.21 : x
2. Step 2: Convert to fraction form
   11,064.47/16,590.59 = 4,394.21/x
3. Step 3: Cross multiply
   11,064.47x = 16,590.59 × 4,394.21
4. Step 4: Simplify right side
   11,064.47x = 72,902,514.51
5. Step 5: Solve for x
   x = 72,902,514.51/11,064.47
6. Step 6: Final answer
   x = 6,588.88