Finding the Fourth Proportional to 28,967.58, 39,958.56 and 17,028.72

Step by Step Solution

1. Step 1: Write the proportion equation
   28,967.58 : 39,958.56 = 17,028.72 : x
2. Step 2: Convert to fraction form
   28,967.58/39,958.56 = 17,028.72/x
3. Step 3: Cross multiply
   28,967.58x = 39,958.56 × 17,028.72
4. Step 4: Simplify right side
   28,967.58x = 680,443,129.84
5. Step 5: Solve for x
   x = 680,443,129.84/28,967.58
6. Step 6: Final answer
   x = 23,489.82