Finding the Fourth Proportional to 20,290.67, 27,956.56 and 15,164.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,290.67 : 27,956.56 = 15,164.72 : x
2. Step 2: Convert to fraction form
   20,290.67/27,956.56 = 15,164.72/x
3. Step 3: Cross multiply
   20,290.67x = 27,956.56 × 15,164.72
4. Step 4: Simplify right side
   20,290.67x = 423,953,404.56
5. Step 5: Solve for x
   x = 423,953,404.56/20,290.67
6. Step 6: Final answer
   x = 20,894.01