Finding the Fourth Proportional to 17,955.72, 24,780.06 and 12,357

Step by Step Solution

1. Step 1: Write the proportion equation
   17,955.72 : 24,780.06 = 12,357 : x
2. Step 2: Convert to fraction form
   17,955.72/24,780.06 = 12,357/x
3. Step 3: Cross multiply
   17,955.72x = 24,780.06 × 12,357
4. Step 4: Simplify right side
   17,955.72x = 306,207,201.42
5. Step 5: Solve for x
   x = 306,207,201.42/17,955.72
6. Step 6: Final answer
   x = 17,053.46