Finding the Fourth Proportional to 33,678.69, 46,457.30 and 21,081.57

Step by Step Solution

1. Step 1: Write the proportion equation
   33,678.69 : 46,457.30 = 21,081.57 : x
2. Step 2: Convert to fraction form
   33,678.69/46,457.30 = 21,081.57/x
3. Step 3: Cross multiply
   33,678.69x = 46,457.30 × 21,081.57
4. Step 4: Simplify right side
   33,678.69x = 979,392,821.96
5. Step 5: Solve for x
   x = 979,392,821.96/33,678.69
6. Step 6: Final answer
   x = 29,080.49