Finding the Fourth Proportional to 38,936.01, 53,731.38 and 21,945.72

Step by Step Solution

1. Step 1: Write the proportion equation
   38,936.01 : 53,731.38 = 21,945.72 : x
2. Step 2: Convert to fraction form
   38,936.01/53,731.38 = 21,945.72/x
3. Step 3: Cross multiply
   38,936.01x = 53,731.38 × 21,945.72
4. Step 4: Simplify right side
   38,936.01x = 1,179,173,820.69
5. Step 5: Solve for x
   x = 1,179,173,820.69/38,936.01
6. Step 6: Final answer
   x = 30,284.92