Finding the Fourth Proportional to 28,012.43, 38,653.89 and 17,105.08

Step by Step Solution

1. Step 1: Write the proportion equation
   28,012.43 : 38,653.89 = 17,105.08 : x
2. Step 2: Convert to fraction form
   28,012.43/38,653.89 = 17,105.08/x
3. Step 3: Cross multiply
   28,012.43x = 38,653.89 × 17,105.08
4. Step 4: Simplify right side
   28,012.43x = 661,177,880.76
5. Step 5: Solve for x
   x = 661,177,880.76/28,012.43
6. Step 6: Final answer
   x = 23,603.02