Finding the Fourth Proportional to 37,781.27, 52,139.55 and 20,786.25

Step by Step Solution

1. Step 1: Write the proportion equation
   37,781.27 : 52,139.55 = 20,786.25 : x
2. Step 2: Convert to fraction form
   37,781.27/52,139.55 = 20,786.25/x
3. Step 3: Cross multiply
   37,781.27x = 52,139.55 × 20,786.25
4. Step 4: Simplify right side
   37,781.27x = 1,083,785,617.26
5. Step 5: Solve for x
   x = 1,083,785,617.26/37,781.27
6. Step 6: Final answer
   x = 28,685.79