Finding the Fourth Proportional to 42,786.42, 64,126.17 and 20,593.86

Step by Step Solution

1. Step 1: Write the proportion equation
   42,786.42 : 64,126.17 = 20,593.86 : x
2. Step 2: Convert to fraction form
   42,786.42/64,126.17 = 20,593.86/x
3. Step 3: Cross multiply
   42,786.42x = 64,126.17 × 20,593.86
4. Step 4: Simplify right side
   42,786.42x = 1,320,605,367.32
5. Step 5: Solve for x
   x = 1,320,605,367.32/42,786.42
6. Step 6: Final answer
   x = 30,865.06