Finding the Fourth Proportional to 76,311, 105,315.66 and 42,783.48

Step by Step Solution

1. Step 1: Write the proportion equation
   76,311 : 105,315.66 = 42,783.48 : x
2. Step 2: Convert to fraction form
   76,311/105,315.66 = 42,783.48/x
3. Step 3: Cross multiply
   76,311x = 105,315.66 × 42,783.48
4. Step 4: Simplify right side
   76,311x = 4,505,770,433.30
5. Step 5: Solve for x
   x = 4,505,770,433.30/76,311
6. Step 6: Final answer
   x = 59,044.84