Finding the Fourth Proportional to 37,057.42, 51,139.38 and 20,290.42

Step by Step Solution

1. Step 1: Write the proportion equation
   37,057.42 : 51,139.38 = 20,290.42 : x
2. Step 2: Convert to fraction form
   37,057.42/51,139.38 = 20,290.42/x
3. Step 3: Cross multiply
   37,057.42x = 51,139.38 × 20,290.42
4. Step 4: Simplify right side
   37,057.42x = 1,037,639,498.74
5. Step 5: Solve for x
   x = 1,037,639,498.74/37,057.42
6. Step 6: Final answer
   x = 28,000.86