Finding the Fourth Proportional to 78,165.58, 107,868.87 and 42,355.65

Step by Step Solution

1. Step 1: Write the proportion equation
   78,165.58 : 107,868.87 = 42,355.65 : x
2. Step 2: Convert to fraction form
   78,165.58/107,868.87 = 42,355.65/x
3. Step 3: Cross multiply
   78,165.58x = 107,868.87 × 42,355.65
4. Step 4: Simplify right side
   78,165.58x = 4,568,856,103.62
5. Step 5: Solve for x
   x = 4,568,856,103.62/78,165.58
6. Step 6: Final answer
   x = 58,451.00