Finding the Fourth Proportional to 55,710.45, 76,878.72 and 39,821.49

Step by Step Solution

1. Step 1: Write the proportion equation
   55,710.45 : 76,878.72 = 39,821.49 : x
2. Step 2: Convert to fraction form
   55,710.45/76,878.72 = 39,821.49/x
3. Step 3: Cross multiply
   55,710.45x = 76,878.72 × 39,821.49
4. Step 4: Simplify right side
   55,710.45x = 3,061,425,179.69
5. Step 5: Solve for x
   x = 3,061,425,179.69/55,710.45
6. Step 6: Final answer
   x = 54,952.44