Finding the Fourth Proportional to 42,786.68, 64,126.50 and 20,594.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,786.68 : 64,126.50 = 20,594.12 : x
2. Step 2: Convert to fraction form
   42,786.68/64,126.50 = 20,594.12/x
3. Step 3: Cross multiply
   42,786.68x = 64,126.50 × 20,594.12
4. Step 4: Simplify right side
   42,786.68x = 1,320,628,836.18
5. Step 5: Solve for x
   x = 1,320,628,836.18/42,786.68
6. Step 6: Final answer
   x = 30,865.42