Finding the Fourth Proportional to 53,721.05, 80,553.72 and 28,434.27

Step by Step Solution

1. Step 1: Write the proportion equation
   53,721.05 : 80,553.72 = 28,434.27 : x
2. Step 2: Convert to fraction form
   53,721.05/80,553.72 = 28,434.27/x
3. Step 3: Cross multiply
   53,721.05x = 80,553.72 × 28,434.27
4. Step 4: Simplify right side
   53,721.05x = 2,290,485,821.22
5. Step 5: Solve for x
   x = 2,290,485,821.22/53,721.05
6. Step 6: Final answer
   x = 42,636.66