Finding the Fourth Proportional to 33,321.40, 45,983.82 and 21,385

Step by Step Solution

1. Step 1: Write the proportion equation
   33,321.40 : 45,983.82 = 21,385 : x
2. Step 2: Convert to fraction form
   33,321.40/45,983.82 = 21,385/x
3. Step 3: Cross multiply
   33,321.40x = 45,983.82 × 21,385
4. Step 4: Simplify right side
   33,321.40x = 983,363,990.70
5. Step 5: Solve for x
   x = 983,363,990.70/33,321.40
6. Step 6: Final answer
   x = 29,511.48