Finding the Fourth Proportional to 17,956.81, 24,780.02 and 9,890.70

Step by Step Solution

1. Step 1: Write the proportion equation
   17,956.81 : 24,780.02 = 9,890.70 : x
2. Step 2: Convert to fraction form
   17,956.81/24,780.02 = 9,890.70/x
3. Step 3: Cross multiply
   17,956.81x = 24,780.02 × 9,890.70
4. Step 4: Simplify right side
   17,956.81x = 245,091,743.81
5. Step 5: Solve for x
   x = 245,091,743.81/17,956.81
6. Step 6: Final answer
   x = 13,648.96