Finding the Fourth Proportional to 56,216.10, 77,578.56 and 30,722.16

Step by Step Solution

1. Step 1: Write the proportion equation
   56,216.10 : 77,578.56 = 30,722.16 : x
2. Step 2: Convert to fraction form
   56,216.10/77,578.56 = 30,722.16/x
3. Step 3: Cross multiply
   56,216.10x = 77,578.56 × 30,722.16
4. Step 4: Simplify right side
   56,216.10x = 2,383,380,932.89
5. Step 5: Solve for x
   x = 2,383,380,932.89/56,216.10
6. Step 6: Final answer
   x = 42,396.77