Finding the Fourth Proportional to 12,758.94, 19,089.15 and 12,726.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,758.94 : 19,089.15 = 12,726.12 : x
2. Step 2: Convert to fraction form
   12,758.94/19,089.15 = 12,726.12/x
3. Step 3: Cross multiply
   12,758.94x = 19,089.15 × 12,726.12
4. Step 4: Simplify right side
   12,758.94x = 242,930,813.60
5. Step 5: Solve for x
   x = 242,930,813.60/12,758.94
6. Step 6: Final answer
   x = 19,040.05