Finding the Fourth Proportional to 37,488, 51,733.50 and 20,721

Step by Step Solution

1. Step 1: Write the proportion equation
   37,488 : 51,733.50 = 20,721 : x
2. Step 2: Convert to fraction form
   37,488/51,733.50 = 20,721/x
3. Step 3: Cross multiply
   37,488x = 51,733.50 × 20,721
4. Step 4: Simplify right side
   37,488x = 1,071,969,853.50
5. Step 5: Solve for x
   x = 1,071,969,853.50/37,488
6. Step 6: Final answer
   x = 28,595.01