Finding the Fourth Proportional to 28,614.24, 42,906.72 and 13,018.56

Step by Step Solution

1. Step 1: Write the proportion equation
   28,614.24 : 42,906.72 = 13,018.56 : x
2. Step 2: Convert to fraction form
   28,614.24/42,906.72 = 13,018.56/x
3. Step 3: Cross multiply
   28,614.24x = 42,906.72 × 13,018.56
4. Step 4: Simplify right side
   28,614.24x = 558,583,708.72
5. Step 5: Solve for x
   x = 558,583,708.72/28,614.24
6. Step 6: Final answer
   x = 19,521.18