Finding the Fourth Proportional to 37,385.48, 51,591.33 and 20,389.86

Step by Step Solution

1. Step 1: Write the proportion equation
   37,385.48 : 51,591.33 = 20,389.86 : x
2. Step 2: Convert to fraction form
   37,385.48/51,591.33 = 20,389.86/x
3. Step 3: Cross multiply
   37,385.48x = 51,591.33 × 20,389.86
4. Step 4: Simplify right side
   37,385.48x = 1,051,939,995.91
5. Step 5: Solve for x
   x = 1,051,939,995.91/37,385.48
6. Step 6: Final answer
   x = 28,137.67