Finding the Fourth Proportional to 21,796.57, 32,653.59 and 12,885.22

Step by Step Solution

1. Step 1: Write the proportion equation
   21,796.57 : 32,653.59 = 12,885.22 : x
2. Step 2: Convert to fraction form
   21,796.57/32,653.59 = 12,885.22/x
3. Step 3: Cross multiply
   21,796.57x = 32,653.59 × 12,885.22
4. Step 4: Simplify right side
   21,796.57x = 420,748,690.94
5. Step 5: Solve for x
   x = 420,748,690.94/21,796.57
6. Step 6: Final answer
   x = 19,303.44