Finding the Fourth Proportional to 28,761.18, 43,105.42 and 12,949.37

Step by Step Solution

1. Step 1: Write the proportion equation
   28,761.18 : 43,105.42 = 12,949.37 : x
2. Step 2: Convert to fraction form
   28,761.18/43,105.42 = 12,949.37/x
3. Step 3: Cross multiply
   28,761.18x = 43,105.42 × 12,949.37
4. Step 4: Simplify right side
   28,761.18x = 558,188,156.54
5. Step 5: Solve for x
   x = 558,188,156.54/28,761.18
6. Step 6: Final answer
   x = 19,407.69