Finding the Fourth Proportional to 21,867, 32,807.74 and 10,781.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,867 : 32,807.74 = 10,781.32 : x
2. Step 2: Convert to fraction form
   21,867/32,807.74 = 10,781.32/x
3. Step 3: Cross multiply
   21,867x = 32,807.74 × 10,781.32
4. Step 4: Simplify right side
   21,867x = 353,710,743.42
5. Step 5: Solve for x
   x = 353,710,743.42/21,867
6. Step 6: Final answer
   x = 16,175.55