Finding the Fourth Proportional to 12,926.40, 17,837.76 and 7,260.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,926.40 : 17,837.76 = 7,260.42 : x
2. Step 2: Convert to fraction form
   12,926.40/17,837.76 = 7,260.42/x
3. Step 3: Cross multiply
   12,926.40x = 17,837.76 × 7,260.42
4. Step 4: Simplify right side
   12,926.40x = 129,509,629.46
5. Step 5: Solve for x
   x = 129,509,629.46/12,926.40
6. Step 6: Final answer
   x = 10,019.00