Finding the Fourth Proportional to 30,659.58, 42,307.78 and 17,228.31

Step by Step Solution

1. Step 1: Write the proportion equation
   30,659.58 : 42,307.78 = 17,228.31 : x
2. Step 2: Convert to fraction form
   30,659.58/42,307.78 = 17,228.31/x
3. Step 3: Cross multiply
   30,659.58x = 42,307.78 × 17,228.31
4. Step 4: Simplify right side
   30,659.58x = 728,891,506.18
5. Step 5: Solve for x
   x = 728,891,506.18/30,659.58
6. Step 6: Final answer
   x = 23,773.70