Finding the Fourth Proportional to 21,433.59, 29,579.76 and 12,002.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,433.59 : 29,579.76 = 12,002.76 : x
2. Step 2: Convert to fraction form
   21,433.59/29,579.76 = 12,002.76/x
3. Step 3: Cross multiply
   21,433.59x = 29,579.76 × 12,002.76
4. Step 4: Simplify right side
   21,433.59x = 355,038,760.14
5. Step 5: Solve for x
   x = 355,038,760.14/21,433.59
6. Step 6: Final answer
   x = 16,564.60