Finding the Fourth Proportional to 1,955.78, 2,699.04 and 1,071.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,955.78 : 2,699.04 = 1,071.56 : x
2. Step 2: Convert to fraction form
   1,955.78/2,699.04 = 1,071.56/x
3. Step 3: Cross multiply
   1,955.78x = 2,699.04 × 1,071.56
4. Step 4: Simplify right side
   1,955.78x = 2,892,183.30
5. Step 5: Solve for x
   x = 2,892,183.30/1,955.78
6. Step 6: Final answer
   x = 1,478.79