Finding the Fourth Proportional to 2,663.60, 3,996.04 and 1,020.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,663.60 : 3,996.04 = 1,020.12 : x
2. Step 2: Convert to fraction form
   2,663.60/3,996.04 = 1,020.12/x
3. Step 3: Cross multiply
   2,663.60x = 3,996.04 × 1,020.12
4. Step 4: Simplify right side
   2,663.60x = 4,076,440.32
5. Step 5: Solve for x
   x = 4,076,440.32/2,663.60
6. Step 6: Final answer
   x = 1,530.43