Finding the Fourth Proportional to 28,057.59, 38,694.17 and 21,674.59

Step by Step Solution

1. Step 1: Write the proportion equation
   28,057.59 : 38,694.17 = 21,674.59 : x
2. Step 2: Convert to fraction form
   28,057.59/38,694.17 = 21,674.59/x
3. Step 3: Cross multiply
   28,057.59x = 38,694.17 × 21,674.59
4. Step 4: Simplify right side
   28,057.59x = 838,680,227.59
5. Step 5: Solve for x
   x = 838,680,227.59/28,057.59
6. Step 6: Final answer
   x = 29,891.39