Finding the Fourth Proportional to 76,426.38, 105,462.39 and 42,431.67

Step by Step Solution

1. Step 1: Write the proportion equation
   76,426.38 : 105,462.39 = 42,431.67 : x
2. Step 2: Convert to fraction form
   76,426.38/105,462.39 = 42,431.67/x
3. Step 3: Cross multiply
   76,426.38x = 105,462.39 × 42,431.67
4. Step 4: Simplify right side
   76,426.38x = 4,474,945,329.89
5. Step 5: Solve for x
   x = 4,474,945,329.89/76,426.38
6. Step 6: Final answer
   x = 58,552.37