Finding the Fourth Proportional to 55,721.72, 76,897.32 and 30,571.22

Step by Step Solution

1. Step 1: Write the proportion equation
   55,721.72 : 76,897.32 = 30,571.22 : x
2. Step 2: Convert to fraction form
   55,721.72/76,897.32 = 30,571.22/x
3. Step 3: Cross multiply
   55,721.72x = 76,897.32 × 30,571.22
4. Step 4: Simplify right side
   55,721.72x = 2,350,844,848.33
5. Step 5: Solve for x
   x = 2,350,844,848.33/55,721.72
6. Step 6: Final answer
   x = 42,189.02