Finding the Fourth Proportional to 37,721.96, 52,062.72 and 21,816.08

Step by Step Solution

1. Step 1: Write the proportion equation
   37,721.96 : 52,062.72 = 21,816.08 : x
2. Step 2: Convert to fraction form
   37,721.96/52,062.72 = 21,816.08/x
3. Step 3: Cross multiply
   37,721.96x = 52,062.72 × 21,816.08
4. Step 4: Simplify right side
   37,721.96x = 1,135,804,464.54
5. Step 5: Solve for x
   x = 1,135,804,464.54/37,721.96
6. Step 6: Final answer
   x = 30,109.90