Finding the Fourth Proportional to 39,726.72, 54,820.16 and 21,822.48

Step by Step Solution

1. Step 1: Write the proportion equation
   39,726.72 : 54,820.16 = 21,822.48 : x
2. Step 2: Convert to fraction form
   39,726.72/54,820.16 = 21,822.48/x
3. Step 3: Cross multiply
   39,726.72x = 54,820.16 × 21,822.48
4. Step 4: Simplify right side
   39,726.72x = 1,196,311,845.20
5. Step 5: Solve for x
   x = 1,196,311,845.20/39,726.72
6. Step 6: Final answer
   x = 30,113.53