Finding the Fourth Proportional to 76,315.24, 105,311.37 and 42,321.06

Step by Step Solution

1. Step 1: Write the proportion equation
   76,315.24 : 105,311.37 = 42,321.06 : x
2. Step 2: Convert to fraction form
   76,315.24/105,311.37 = 42,321.06/x
3. Step 3: Cross multiply
   76,315.24x = 105,311.37 × 42,321.06
4. Step 4: Simplify right side
   76,315.24x = 4,456,888,808.45
5. Step 5: Solve for x
   x = 4,456,888,808.45/76,315.24
6. Step 6: Final answer
   x = 58,401.03