Finding the Fourth Proportional to 21,663.57, 29,883.25 and 13,043.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,663.57 : 29,883.25 = 13,043.76 : x
2. Step 2: Convert to fraction form
   21,663.57/29,883.25 = 13,043.76/x
3. Step 3: Cross multiply
   21,663.57x = 29,883.25 × 13,043.76
4. Step 4: Simplify right side
   21,663.57x = 389,789,941.02
5. Step 5: Solve for x
   x = 389,789,941.02/21,663.57
6. Step 6: Final answer
   x = 17,992.88