Finding the Fourth Proportional to 56,735.15, 78,328.28 and 50,429.30

Step by Step Solution

1. Step 1: Write the proportion equation
   56,735.15 : 78,328.28 = 50,429.30 : x
2. Step 2: Convert to fraction form
   56,735.15/78,328.28 = 50,429.30/x
3. Step 3: Cross multiply
   56,735.15x = 78,328.28 × 50,429.30
4. Step 4: Simplify right side
   56,735.15x = 3,950,040,078.46
5. Step 5: Solve for x
   x = 3,950,040,078.46/56,735.15
6. Step 6: Final answer
   x = 69,622.45