Finding the Fourth Proportional to 56,216.42, 77,579.69 and 30,723.87

Step by Step Solution

1. Step 1: Write the proportion equation
   56,216.42 : 77,579.69 = 30,723.87 : x
2. Step 2: Convert to fraction form
   56,216.42/77,579.69 = 30,723.87/x
3. Step 3: Cross multiply
   56,216.42x = 77,579.69 × 30,723.87
4. Step 4: Simplify right side
   56,216.42x = 2,383,548,156.58
5. Step 5: Solve for x
   x = 2,383,548,156.58/56,216.42
6. Step 6: Final answer
   x = 42,399.50