Finding the Fourth Proportional to 20,562.42, 28,362.08 and 13,018.34

Step by Step Solution

1. Step 1: Write the proportion equation
   20,562.42 : 28,362.08 = 13,018.34 : x
2. Step 2: Convert to fraction form
   20,562.42/28,362.08 = 13,018.34/x
3. Step 3: Cross multiply
   20,562.42x = 28,362.08 × 13,018.34
4. Step 4: Simplify right side
   20,562.42x = 369,227,200.55
5. Step 5: Solve for x
   x = 369,227,200.55/20,562.42
6. Step 6: Final answer
   x = 17,956.41