Finding the Fourth Proportional to 33,309.57, 45,962.78 and 21,389.05

Step by Step Solution

1. Step 1: Write the proportion equation
   33,309.57 : 45,962.78 = 21,389.05 : x
2. Step 2: Convert to fraction form
   33,309.57/45,962.78 = 21,389.05/x
3. Step 3: Cross multiply
   33,309.57x = 45,962.78 × 21,389.05
4. Step 4: Simplify right side
   33,309.57x = 983,100,369.57
5. Step 5: Solve for x
   x = 983,100,369.57/33,309.57
6. Step 6: Final answer
   x = 29,514.05