Finding the Fourth Proportional to 65,809.62, 98,721.33 and 21,439.83

Step by Step Solution

1. Step 1: Write the proportion equation
   65,809.62 : 98,721.33 = 21,439.83 : x
2. Step 2: Convert to fraction form
   65,809.62/98,721.33 = 21,439.83/x
3. Step 3: Cross multiply
   65,809.62x = 98,721.33 × 21,439.83
4. Step 4: Simplify right side
   65,809.62x = 2,116,568,532.57
5. Step 5: Solve for x
   x = 2,116,568,532.57/65,809.62
6. Step 6: Final answer
   x = 32,161.99