Finding the Fourth Proportional to 56,924.28, 78,560.82 and 42,559.20

Step by Step Solution

1. Step 1: Write the proportion equation
   56,924.28 : 78,560.82 = 42,559.20 : x
2. Step 2: Convert to fraction form
   56,924.28/78,560.82 = 42,559.20/x
3. Step 3: Cross multiply
   56,924.28x = 78,560.82 × 42,559.20
4. Step 4: Simplify right side
   56,924.28x = 3,343,485,650.54
5. Step 5: Solve for x
   x = 3,343,485,650.54/56,924.28
6. Step 6: Final answer
   x = 58,735.67