Finding the Fourth Proportional to 72,901.38, 108,952.63 and 53,221.38

Step by Step Solution

1. Step 1: Write the proportion equation
   72,901.38 : 108,952.63 = 53,221.38 : x
2. Step 2: Convert to fraction form
   72,901.38/108,952.63 = 53,221.38/x
3. Step 3: Cross multiply
   72,901.38x = 108,952.63 × 53,221.38
4. Step 4: Simplify right side
   72,901.38x = 5,798,609,323.23
5. Step 5: Solve for x
   x = 5,798,609,323.23/72,901.38
6. Step 6: Final answer
   x = 79,540.46