Finding the Fourth Proportional to 28,426.62, 42,658.38 and 12,844.38

Step by Step Solution

1. Step 1: Write the proportion equation
   28,426.62 : 42,658.38 = 12,844.38 : x
2. Step 2: Convert to fraction form
   28,426.62/42,658.38 = 12,844.38/x
3. Step 3: Cross multiply
   28,426.62x = 42,658.38 × 12,844.38
4. Step 4: Simplify right side
   28,426.62x = 547,920,442.90
5. Step 5: Solve for x
   x = 547,920,442.90/28,426.62
6. Step 6: Final answer
   x = 19,274.91