Finding the Fourth Proportional to 56,219.12, 77,579.34 and 31,067

Step by Step Solution

1. Step 1: Write the proportion equation
   56,219.12 : 77,579.34 = 31,067 : x
2. Step 2: Convert to fraction form
   56,219.12/77,579.34 = 31,067/x
3. Step 3: Cross multiply
   56,219.12x = 77,579.34 × 31,067
4. Step 4: Simplify right side
   56,219.12x = 2,410,157,355.78
5. Step 5: Solve for x
   x = 2,410,157,355.78/56,219.12
6. Step 6: Final answer
   x = 42,870.78