Finding the Fourth Proportional to 57,796.72, 79,687.74 and 48,698.80

Step by Step Solution

1. Step 1: Write the proportion equation
   57,796.72 : 79,687.74 = 48,698.80 : x
2. Step 2: Convert to fraction form
   57,796.72/79,687.74 = 48,698.80/x
3. Step 3: Cross multiply
   57,796.72x = 79,687.74 × 48,698.80
4. Step 4: Simplify right side
   57,796.72x = 3,880,697,312.71
5. Step 5: Solve for x
   x = 3,880,697,312.71/57,796.72
6. Step 6: Final answer
   x = 67,143.90