Finding the Fourth Proportional to 43,404.09, 65,004.04 and 21,147.72

Step by Step Solution

1. Step 1: Write the proportion equation
   43,404.09 : 65,004.04 = 21,147.72 : x
2. Step 2: Convert to fraction form
   43,404.09/65,004.04 = 21,147.72/x
3. Step 3: Cross multiply
   43,404.09x = 65,004.04 × 21,147.72
4. Step 4: Simplify right side
   43,404.09x = 1,374,687,236.79
5. Step 5: Solve for x
   x = 1,374,687,236.79/43,404.09
6. Step 6: Final answer
   x = 31,671.84