Finding the Fourth Proportional to 21,513.76, 32,265.78 and 8,181.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,513.76 : 32,265.78 = 8,181.98 : x
2. Step 2: Convert to fraction form
   21,513.76/32,265.78 = 8,181.98/x
3. Step 3: Cross multiply
   21,513.76x = 32,265.78 × 8,181.98
4. Step 4: Simplify right side
   21,513.76x = 263,997,966.64
5. Step 5: Solve for x
   x = 263,997,966.64/21,513.76
6. Step 6: Final answer
   x = 12,271.12