Finding the Fourth Proportional to 81,561.33, 122,327.42 and 21,590.15

Step by Step Solution

1. Step 1: Write the proportion equation
   81,561.33 : 122,327.42 = 21,590.15 : x
2. Step 2: Convert to fraction form
   81,561.33/122,327.42 = 21,590.15/x
3. Step 3: Cross multiply
   81,561.33x = 122,327.42 × 21,590.15
4. Step 4: Simplify right side
   81,561.33x = 2,641,066,627.33
5. Step 5: Solve for x
   x = 2,641,066,627.33/81,561.33
6. Step 6: Final answer
   x = 32,381.36