Finding the Fourth Proportional to 15,290.72, 22,901.84 and 13,290.72

Step by Step Solution

1. Step 1: Write the proportion equation
   15,290.72 : 22,901.84 = 13,290.72 : x
2. Step 2: Convert to fraction form
   15,290.72/22,901.84 = 13,290.72/x
3. Step 3: Cross multiply
   15,290.72x = 22,901.84 × 13,290.72
4. Step 4: Simplify right side
   15,290.72x = 304,381,942.92
5. Step 5: Solve for x
   x = 304,381,942.92/15,290.72
6. Step 6: Final answer
   x = 19,906.32