Finding the Fourth Proportional to 28,029.06, 42,039.27 and 12,443.94

Step by Step Solution

1. Step 1: Write the proportion equation
   28,029.06 : 42,039.27 = 12,443.94 : x
2. Step 2: Convert to fraction form
   28,029.06/42,039.27 = 12,443.94/x
3. Step 3: Cross multiply
   28,029.06x = 42,039.27 × 12,443.94
4. Step 4: Simplify right side
   28,029.06x = 523,134,153.52
5. Step 5: Solve for x
   x = 523,134,153.52/28,029.06
6. Step 6: Final answer
   x = 18,663.99