Finding the Fourth Proportional to 76,386.24, 105,412.59 and 42,394.79

Step by Step Solution

1. Step 1: Write the proportion equation
   76,386.24 : 105,412.59 = 42,394.79 : x
2. Step 2: Convert to fraction form
   76,386.24/105,412.59 = 42,394.79/x
3. Step 3: Cross multiply
   76,386.24x = 105,412.59 × 42,394.79
4. Step 4: Simplify right side
   76,386.24x = 4,468,944,879.94
5. Step 5: Solve for x
   x = 4,468,944,879.94/76,386.24
6. Step 6: Final answer
   x = 58,504.58