Finding the Fourth Proportional to 17,680.72, 26,462.74 and 15,736.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,680.72 : 26,462.74 = 15,736.72 : x
2. Step 2: Convert to fraction form
   17,680.72/26,462.74 = 15,736.72/x
3. Step 3: Cross multiply
   17,680.72x = 26,462.74 × 15,736.72
4. Step 4: Simplify right side
   17,680.72x = 416,436,729.81
5. Step 5: Solve for x
   x = 416,436,729.81/17,680.72
6. Step 6: Final answer
   x = 23,553.15