Finding the Fourth Proportional to 12,780.38, 17,635.69 and 9,425.00

Step by Step Solution

1. Step 1: Write the proportion equation
   12,780.38 : 17,635.69 = 9,425.00 : x
2. Step 2: Convert to fraction form
   12,780.38/17,635.69 = 9,425.00/x
3. Step 3: Cross multiply
   12,780.38x = 17,635.69 × 9,425.00
4. Step 4: Simplify right side
   12,780.38x = 166,216,398.78
5. Step 5: Solve for x
   x = 166,216,398.78/12,780.38
6. Step 6: Final answer
   x = 13,005.59