Finding the Fourth Proportional to 76,147, 105,068.28 and 49,285.78

Step by Step Solution

1. Step 1: Write the proportion equation
   76,147 : 105,068.28 = 49,285.78 : x
2. Step 2: Convert to fraction form
   76,147/105,068.28 = 49,285.78/x
3. Step 3: Cross multiply
   76,147x = 105,068.28 × 49,285.78
4. Step 4: Simplify right side
   76,147x = 5,178,372,133.06
5. Step 5: Solve for x
   x = 5,178,372,133.06/76,147
6. Step 6: Final answer
   x = 68,004.94