Finding the Fourth Proportional to 37,776.38, 52,130.39 and 20,780.55

Step by Step Solution

1. Step 1: Write the proportion equation
   37,776.38 : 52,130.39 = 20,780.55 : x
2. Step 2: Convert to fraction form
   37,776.38/52,130.39 = 20,780.55/x
3. Step 3: Cross multiply
   37,776.38x = 52,130.39 × 20,780.55
4. Step 4: Simplify right side
   37,776.38x = 1,083,298,072.01
5. Step 5: Solve for x
   x = 1,083,298,072.01/37,776.38
6. Step 6: Final answer
   x = 28,676.60