Finding the Fourth Proportional to 21,645.59, 29,870.76 and 12,084.92

Step by Step Solution

1. Step 1: Write the proportion equation
   21,645.59 : 29,870.76 = 12,084.92 : x
2. Step 2: Convert to fraction form
   21,645.59/29,870.76 = 12,084.92/x
3. Step 3: Cross multiply
   21,645.59x = 29,870.76 × 12,084.92
4. Step 4: Simplify right side
   21,645.59x = 360,985,595.59
5. Step 5: Solve for x
   x = 360,985,595.59/21,645.59
6. Step 6: Final answer
   x = 16,677.09