Finding the Fourth Proportional to 12,959.10, 19,438.71 and 7,112.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,959.10 : 19,438.71 = 7,112.52 : x
2. Step 2: Convert to fraction form
   12,959.10/19,438.71 = 7,112.52/x
3. Step 3: Cross multiply
   12,959.10x = 19,438.71 × 7,112.52
4. Step 4: Simplify right side
   12,959.10x = 138,258,213.65
5. Step 5: Solve for x
   x = 138,258,213.65/12,959.10
6. Step 6: Final answer
   x = 10,668.81