Finding the Fourth Proportional to 42,709.35, 64,077.72 and 20,524.33

Step by Step Solution

1. Step 1: Write the proportion equation
   42,709.35 : 64,077.72 = 20,524.33 : x
2. Step 2: Convert to fraction form
   42,709.35/64,077.72 = 20,524.33/x
3. Step 3: Cross multiply
   42,709.35x = 64,077.72 × 20,524.33
4. Step 4: Simplify right side
   42,709.35x = 1,315,152,270.93
5. Step 5: Solve for x
   x = 1,315,152,270.93/42,709.35
6. Step 6: Final answer
   x = 30,793.08