Finding the Fourth Proportional to 21,587.84, 29,788.72 and 12,026.20

Step by Step Solution

1. Step 1: Write the proportion equation
   21,587.84 : 29,788.72 = 12,026.20 : x
2. Step 2: Convert to fraction form
   21,587.84/29,788.72 = 12,026.20/x
3. Step 3: Cross multiply
   21,587.84x = 29,788.72 × 12,026.20
4. Step 4: Simplify right side
   21,587.84x = 358,245,104.46
5. Step 5: Solve for x
   x = 358,245,104.46/21,587.84
6. Step 6: Final answer
   x = 16,594.76