Finding the Fourth Proportional to 2,663.60, 3,995.16 and 1,019.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,663.60 : 3,995.16 = 1,019.12 : x
2. Step 2: Convert to fraction form
   2,663.60/3,995.16 = 1,019.12/x
3. Step 3: Cross multiply
   2,663.60x = 3,995.16 × 1,019.12
4. Step 4: Simplify right side
   2,663.60x = 4,071,547.46
5. Step 5: Solve for x
   x = 4,071,547.46/2,663.60
6. Step 6: Final answer
   x = 1,528.59