Finding the Fourth Proportional to 37,188.72, 51,320.52 and 20,422.80

Step by Step Solution

1. Step 1: Write the proportion equation
   37,188.72 : 51,320.52 = 20,422.80 : x
2. Step 2: Convert to fraction form
   37,188.72/51,320.52 = 20,422.80/x
3. Step 3: Cross multiply
   37,188.72x = 51,320.52 × 20,422.80
4. Step 4: Simplify right side
   37,188.72x = 1,048,108,715.86
5. Step 5: Solve for x
   x = 1,048,108,715.86/37,188.72
6. Step 6: Final answer
   x = 28,183.51