Finding the Fourth Proportional to 57,824.82, 79,491.60 and 49,728.78

Step by Step Solution

1. Step 1: Write the proportion equation
   57,824.82 : 79,491.60 = 49,728.78 : x
2. Step 2: Convert to fraction form
   57,824.82/79,491.60 = 49,728.78/x
3. Step 3: Cross multiply
   57,824.82x = 79,491.60 × 49,728.78
4. Step 4: Simplify right side
   57,824.82x = 3,953,020,288.25
5. Step 5: Solve for x
   x = 3,953,020,288.25/57,824.82
6. Step 6: Final answer
   x = 68,362.00