Finding the Fourth Proportional to 37,405.98, 51,620.43 and 20,638.98

Step by Step Solution

1. Step 1: Write the proportion equation
   37,405.98 : 51,620.43 = 20,638.98 : x
2. Step 2: Convert to fraction form
   37,405.98/51,620.43 = 20,638.98/x
3. Step 3: Cross multiply
   37,405.98x = 51,620.43 × 20,638.98
4. Step 4: Simplify right side
   37,405.98x = 1,065,393,022.36
5. Step 5: Solve for x
   x = 1,065,393,022.36/37,405.98
6. Step 6: Final answer
   x = 28,481.89