Finding the Fourth Proportional to 21,855.59, 32,775.33 and 7,811.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,855.59 : 32,775.33 = 7,811.82 : x
2. Step 2: Convert to fraction form
   21,855.59/32,775.33 = 7,811.82/x
3. Step 3: Cross multiply
   21,855.59x = 32,775.33 × 7,811.82
4. Step 4: Simplify right side
   21,855.59x = 256,034,978.40
5. Step 5: Solve for x
   x = 256,034,978.40/21,855.59
6. Step 6: Final answer
   x = 11,714.85