Finding the Fourth Proportional to 37,406.48, 51,621.12 and 20,639.48

Step by Step Solution

1. Step 1: Write the proportion equation
   37,406.48 : 51,621.12 = 20,639.48 : x
2. Step 2: Convert to fraction form
   37,406.48/51,621.12 = 20,639.48/x
3. Step 3: Cross multiply
   37,406.48x = 51,621.12 × 20,639.48
4. Step 4: Simplify right side
   37,406.48x = 1,065,433,073.82
5. Step 5: Solve for x
   x = 1,065,433,073.82/37,406.48
6. Step 6: Final answer
   x = 28,482.58