Finding the Fourth Proportional to 21,855.34, 32,805.78 and 19,372.30

Step by Step Solution

1. Step 1: Write the proportion equation
   21,855.34 : 32,805.78 = 19,372.30 : x
2. Step 2: Convert to fraction form
   21,855.34/32,805.78 = 19,372.30/x
3. Step 3: Cross multiply
   21,855.34x = 32,805.78 × 19,372.30
4. Step 4: Simplify right side
   21,855.34x = 635,523,411.89
5. Step 5: Solve for x
   x = 635,523,411.89/21,855.34
6. Step 6: Final answer
   x = 29,078.63