Finding the Fourth Proportional to 42,492.54, 63,738.74 and 20,238.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,492.54 : 63,738.74 = 20,238.42 : x
2. Step 2: Convert to fraction form
   42,492.54/63,738.74 = 20,238.42/x
3. Step 3: Cross multiply
   42,492.54x = 63,738.74 × 20,238.42
4. Step 4: Simplify right side
   42,492.54x = 1,289,971,390.39
5. Step 5: Solve for x
   x = 1,289,971,390.39/42,492.54
6. Step 6: Final answer
   x = 30,357.60