Finding the Fourth Proportional to 2,748.47, 4,120.20 and 1,015.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,748.47 : 4,120.20 = 1,015.88 : x
2. Step 2: Convert to fraction form
   2,748.47/4,120.20 = 1,015.88/x
3. Step 3: Cross multiply
   2,748.47x = 4,120.20 × 1,015.88
4. Step 4: Simplify right side
   2,748.47x = 4,185,608.18
5. Step 5: Solve for x
   x = 4,185,608.18/2,748.47
6. Step 6: Final answer
   x = 1,522.89