Finding the Fourth Proportional to 30,833.63, 42,549.57 and 17,221.31

Step by Step Solution

1. Step 1: Write the proportion equation
   30,833.63 : 42,549.57 = 17,221.31 : x
2. Step 2: Convert to fraction form
   30,833.63/42,549.57 = 17,221.31/x
3. Step 3: Cross multiply
   30,833.63x = 42,549.57 × 17,221.31
4. Step 4: Simplify right side
   30,833.63x = 732,759,282.15
5. Step 5: Solve for x
   x = 732,759,282.15/30,833.63
6. Step 6: Final answer
   x = 23,764.94