Finding the Fourth Proportional to 76,556.15, 105,647.39 and 42,563.57

Step by Step Solution

1. Step 1: Write the proportion equation
   76,556.15 : 105,647.39 = 42,563.57 : x
2. Step 2: Convert to fraction form
   76,556.15/105,647.39 = 42,563.57/x
3. Step 3: Cross multiply
   76,556.15x = 105,647.39 × 42,563.57
4. Step 4: Simplify right side
   76,556.15x = 4,496,729,338.53
5. Step 5: Solve for x
   x = 4,496,729,338.53/76,556.15
6. Step 6: Final answer
   x = 58,737.67