Finding the Fourth Proportional to 28,147.46, 42,235.78 and 12,363.59

Step by Step Solution

1. Step 1: Write the proportion equation
   28,147.46 : 42,235.78 = 12,363.59 : x
2. Step 2: Convert to fraction form
   28,147.46/42,235.78 = 12,363.59/x
3. Step 3: Cross multiply
   28,147.46x = 42,235.78 × 12,363.59
4. Step 4: Simplify right side
   28,147.46x = 522,185,867.25
5. Step 5: Solve for x
   x = 522,185,867.25/28,147.46
6. Step 6: Final answer
   x = 18,551.79