Finding the Fourth Proportional to 76,399.46, 105,426.26 and 42,406.30

Step by Step Solution

1. Step 1: Write the proportion equation
   76,399.46 : 105,426.26 = 42,406.30 : x
2. Step 2: Convert to fraction form
   76,399.46/105,426.26 = 42,406.30/x
3. Step 3: Cross multiply
   76,399.46x = 105,426.26 × 42,406.30
4. Step 4: Simplify right side
   76,399.46x = 4,470,737,609.44
5. Step 5: Solve for x
   x = 4,470,737,609.44/76,399.46
6. Step 6: Final answer
   x = 58,517.92