Finding the Fourth Proportional to 21,861.30, 30,167.93 and 12,301.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,861.30 : 30,167.93 = 12,301.72 : x
2. Step 2: Convert to fraction form
   21,861.30/30,167.93 = 12,301.72/x
3. Step 3: Cross multiply
   21,861.30x = 30,167.93 × 12,301.72
4. Step 4: Simplify right side
   21,861.30x = 371,117,383.17
5. Step 5: Solve for x
   x = 371,117,383.17/21,861.30
6. Step 6: Final answer
   x = 16,976.00