Finding the Fourth Proportional to 42,676.69, 64,027.85 and 20,204.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,676.69 : 64,027.85 = 20,204.50 : x
2. Step 2: Convert to fraction form
   42,676.69/64,027.85 = 20,204.50/x
3. Step 3: Cross multiply
   42,676.69x = 64,027.85 × 20,204.50
4. Step 4: Simplify right side
   42,676.69x = 1,293,650,434.23
5. Step 5: Solve for x
   x = 1,293,650,434.23/42,676.69
6. Step 6: Final answer
   x = 30,312.81