Finding the Fourth Proportional to 21,881.21, 32,813.51 and 7,086.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,881.21 : 32,813.51 = 7,086.15 : x
2. Step 2: Convert to fraction form
   21,881.21/32,813.51 = 7,086.15/x
3. Step 3: Cross multiply
   21,881.21x = 32,813.51 × 7,086.15
4. Step 4: Simplify right side
   21,881.21x = 232,521,418.46
5. Step 5: Solve for x
   x = 232,521,418.46/21,881.21
6. Step 6: Final answer
   x = 10,626.54