Finding the Fourth Proportional to 57,019.80, 78,578.46 and 49,554.84

Step by Step Solution

1. Step 1: Write the proportion equation
   57,019.80 : 78,578.46 = 49,554.84 : x
2. Step 2: Convert to fraction form
   57,019.80/78,578.46 = 49,554.84/x
3. Step 3: Cross multiply
   57,019.80x = 78,578.46 × 49,554.84
4. Step 4: Simplify right side
   57,019.80x = 3,893,943,012.75
5. Step 5: Solve for x
   x = 3,893,943,012.75/57,019.80
6. Step 6: Final answer
   x = 68,291.07