Finding the Fourth Proportional to 76,564.43, 105,658.74 and 42,571.83

Step by Step Solution

1. Step 1: Write the proportion equation
   76,564.43 : 105,658.74 = 42,571.83 : x
2. Step 2: Convert to fraction form
   76,564.43/105,658.74 = 42,571.83/x
3. Step 3: Cross multiply
   76,564.43x = 105,658.74 × 42,571.83
4. Step 4: Simplify right side
   76,564.43x = 4,498,085,917.29
5. Step 5: Solve for x
   x = 4,498,085,917.29/76,564.43
6. Step 6: Final answer
   x = 58,749.03