Finding the Fourth Proportional to 76,778.88, 105,953.42 and 42,786.62

Step by Step Solution

1. Step 1: Write the proportion equation
   76,778.88 : 105,953.42 = 42,786.62 : x
2. Step 2: Convert to fraction form
   76,778.88/105,953.42 = 42,786.62/x
3. Step 3: Cross multiply
   76,778.88x = 105,953.42 × 42,786.62
4. Step 4: Simplify right side
   76,778.88x = 4,533,388,240.42
5. Step 5: Solve for x
   x = 4,533,388,240.42/76,778.88
6. Step 6: Final answer
   x = 59,044.73