Finding the Fourth Proportional to 78,786.75, 108,723.87 and 42,977.04

Step by Step Solution

1. Step 1: Write the proportion equation
   78,786.75 : 108,723.87 = 42,977.04 : x
2. Step 2: Convert to fraction form
   78,786.75/108,723.87 = 42,977.04/x
3. Step 3: Cross multiply
   78,786.75x = 108,723.87 × 42,977.04
4. Step 4: Simplify right side
   78,786.75x = 4,672,630,109.94
5. Step 5: Solve for x
   x = 4,672,630,109.94/78,786.75
6. Step 6: Final answer
   x = 59,307.31