Finding the Fourth Proportional to 76,778.82, 105,954.87 and 42,786.56

Step by Step Solution

1. Step 1: Write the proportion equation
   76,778.82 : 105,954.87 = 42,786.56 : x
2. Step 2: Convert to fraction form
   76,778.82/105,954.87 = 42,786.56/x
3. Step 3: Cross multiply
   76,778.82x = 105,954.87 × 42,786.56
4. Step 4: Simplify right side
   76,778.82x = 4,533,444,827.88
5. Step 5: Solve for x
   x = 4,533,444,827.88/76,778.82
6. Step 6: Final answer
   x = 59,045.51