Finding the Fourth Proportional to 28,531.92, 42,768.72 and 17,409

Step by Step Solution

1. Step 1: Write the proportion equation
   28,531.92 : 42,768.72 = 17,409 : x
2. Step 2: Convert to fraction form
   28,531.92/42,768.72 = 17,409/x
3. Step 3: Cross multiply
   28,531.92x = 42,768.72 × 17,409
4. Step 4: Simplify right side
   28,531.92x = 744,560,646.48
5. Step 5: Solve for x
   x = 744,560,646.48/28,531.92
6. Step 6: Final answer
   x = 26,095.71