Finding the Fourth Proportional to 42,407.14, 63,513.83 and 20,236.09

Step by Step Solution

1. Step 1: Write the proportion equation
   42,407.14 : 63,513.83 = 20,236.09 : x
2. Step 2: Convert to fraction form
   42,407.14/63,513.83 = 20,236.09/x
3. Step 3: Cross multiply
   42,407.14x = 63,513.83 × 20,236.09
4. Step 4: Simplify right side
   42,407.14x = 1,285,271,247.28
5. Step 5: Solve for x
   x = 1,285,271,247.28/42,407.14
6. Step 6: Final answer
   x = 30,307.90