Finding the Fourth Proportional to 19,546.24, 29,302.89 and 13,288.72

Step by Step Solution

1. Step 1: Write the proportion equation
   19,546.24 : 29,302.89 = 13,288.72 : x
2. Step 2: Convert to fraction form
   19,546.24/29,302.89 = 13,288.72/x
3. Step 3: Cross multiply
   19,546.24x = 29,302.89 × 13,288.72
4. Step 4: Simplify right side
   19,546.24x = 389,397,900.40
5. Step 5: Solve for x
   x = 389,397,900.40/19,546.24
6. Step 6: Final answer
   x = 19,921.88