Finding the Fourth Proportional to 76,399.26, 105,426.08 and 42,408.42

Step by Step Solution

1. Step 1: Write the proportion equation
   76,399.26 : 105,426.08 = 42,408.42 : x
2. Step 2: Convert to fraction form
   76,399.26/105,426.08 = 42,408.42/x
3. Step 3: Cross multiply
   76,399.26x = 105,426.08 × 42,408.42
4. Step 4: Simplify right side
   76,399.26x = 4,470,953,479.59
5. Step 5: Solve for x
   x = 4,470,953,479.59/76,399.26
6. Step 6: Final answer
   x = 58,520.90