Finding the Fourth Proportional to 12,958.30, 17,883.75 and 7,924.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,958.30 : 17,883.75 = 7,924.78 : x
2. Step 2: Convert to fraction form
   12,958.30/17,883.75 = 7,924.78/x
3. Step 3: Cross multiply
   12,958.30x = 17,883.75 × 7,924.78
4. Step 4: Simplify right side
   12,958.30x = 141,724,784.33
5. Step 5: Solve for x
   x = 141,724,784.33/12,958.30
6. Step 6: Final answer
   x = 10,936.99