Finding the Fourth Proportional to 21,590.86, 32,364.41 and 10,488.19

Step by Step Solution

1. Step 1: Write the proportion equation
   21,590.86 : 32,364.41 = 10,488.19 : x
2. Step 2: Convert to fraction form
   21,590.86/32,364.41 = 10,488.19/x
3. Step 3: Cross multiply
   21,590.86x = 32,364.41 × 10,488.19
4. Step 4: Simplify right side
   21,590.86x = 339,444,081.32
5. Step 5: Solve for x
   x = 339,444,081.32/21,590.86
6. Step 6: Final answer
   x = 15,721.66