Finding the Fourth Proportional to 12,964.23, 17,899.25 and 9,974.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,964.23 : 17,899.25 = 9,974.79 : x
2. Step 2: Convert to fraction form
   12,964.23/17,899.25 = 9,974.79/x
3. Step 3: Cross multiply
   12,964.23x = 17,899.25 × 9,974.79
4. Step 4: Simplify right side
   12,964.23x = 178,541,210.03
5. Step 5: Solve for x
   x = 178,541,210.03/12,964.23
6. Step 6: Final answer
   x = 13,771.83