Finding the Fourth Proportional to 21,635.59, 29,858.61 and 12,077.33

Step by Step Solution

1. Step 1: Write the proportion equation
   21,635.59 : 29,858.61 = 12,077.33 : x
2. Step 2: Convert to fraction form
   21,635.59/29,858.61 = 12,077.33/x
3. Step 3: Cross multiply
   21,635.59x = 29,858.61 × 12,077.33
4. Step 4: Simplify right side
   21,635.59x = 360,612,286.31
5. Step 5: Solve for x
   x = 360,612,286.31/21,635.59
6. Step 6: Final answer
   x = 16,667.55