Finding the Fourth Proportional to 2,885.76, 3,980.16 and 2,047.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,885.76 : 3,980.16 = 2,047.68 : x
2. Step 2: Convert to fraction form
   2,885.76/3,980.16 = 2,047.68/x
3. Step 3: Cross multiply
   2,885.76x = 3,980.16 × 2,047.68
4. Step 4: Simplify right side
   2,885.76x = 8,150,094.03
5. Step 5: Solve for x
   x = 8,150,094.03/2,885.76
6. Step 6: Final answer
   x = 2,824.25