Finding the Fourth Proportional to 56,213.39, 77,575.59 and 30,721.33

Step by Step Solution

1. Step 1: Write the proportion equation
   56,213.39 : 77,575.59 = 30,721.33 : x
2. Step 2: Convert to fraction form
   56,213.39/77,575.59 = 30,721.33/x
3. Step 3: Cross multiply
   56,213.39x = 77,575.59 × 30,721.33
4. Step 4: Simplify right side
   56,213.39x = 2,383,225,146.73
5. Step 5: Solve for x
   x = 2,383,225,146.73/56,213.39
6. Step 6: Final answer
   x = 42,396.04