Finding the Fourth Proportional to 21,521.25, 29,700.84 and 12,089.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,521.25 : 29,700.84 = 12,089.82 : x
2. Step 2: Convert to fraction form
   21,521.25/29,700.84 = 12,089.82/x
3. Step 3: Cross multiply
   21,521.25x = 29,700.84 × 12,089.82
4. Step 4: Simplify right side
   21,521.25x = 359,077,809.45
5. Step 5: Solve for x
   x = 359,077,809.45/21,521.25
6. Step 6: Final answer
   x = 16,684.80