Finding the Fourth Proportional to 12,515.91, 17,273.89 and 7,138.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,515.91 : 17,273.89 = 7,138.36 : x
2. Step 2: Convert to fraction form
   12,515.91/17,273.89 = 7,138.36/x
3. Step 3: Cross multiply
   12,515.91x = 17,273.89 × 7,138.36
4. Step 4: Simplify right side
   12,515.91x = 123,307,159.05
5. Step 5: Solve for x
   x = 123,307,159.05/12,515.91
6. Step 6: Final answer
   x = 9,852.03