Finding the Fourth Proportional to 76,777.97, 105,956.87 and 42,786.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,777.97 : 105,956.87 = 42,786.50 : x
2. Step 2: Convert to fraction form
   76,777.97/105,956.87 = 42,786.50/x
3. Step 3: Cross multiply
   76,777.97x = 105,956.87 × 42,786.50
4. Step 4: Simplify right side
   76,777.97x = 4,533,522,874.54
5. Step 5: Solve for x
   x = 4,533,522,874.54/76,777.97
6. Step 6: Final answer
   x = 59,047.19