Finding the Fourth Proportional to 37,698.72, 52,020.33 and 21,788.28

Step by Step Solution

1. Step 1: Write the proportion equation
   37,698.72 : 52,020.33 = 21,788.28 : x
2. Step 2: Convert to fraction form
   37,698.72/52,020.33 = 21,788.28/x
3. Step 3: Cross multiply
   37,698.72x = 52,020.33 × 21,788.28
4. Step 4: Simplify right side
   37,698.72x = 1,133,433,515.73
5. Step 5: Solve for x
   x = 1,133,433,515.73/37,698.72
6. Step 6: Final answer
   x = 30,065.57