Finding the Fourth Proportional to 76,393.07, 105,417.46 and 42,399.92

Step by Step Solution

1. Step 1: Write the proportion equation
   76,393.07 : 105,417.46 = 42,399.92 : x
2. Step 2: Convert to fraction form
   76,393.07/105,417.46 = 42,399.92/x
3. Step 3: Cross multiply
   76,393.07x = 105,417.46 × 42,399.92
4. Step 4: Simplify right side
   76,393.07x = 4,469,692,187.15
5. Step 5: Solve for x
   x = 4,469,692,187.15/76,393.07
6. Step 6: Final answer
   x = 58,509.13