Finding the Fourth Proportional to 1,956.56, 2,699.98 and 1,072.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,956.56 : 2,699.98 = 1,072.40 : x
2. Step 2: Convert to fraction form
   1,956.56/2,699.98 = 1,072.40/x
3. Step 3: Cross multiply
   1,956.56x = 2,699.98 × 1,072.40
4. Step 4: Simplify right side
   1,956.56x = 2,895,458.55
5. Step 5: Solve for x
   x = 2,895,458.55/1,956.56
6. Step 6: Final answer
   x = 1,479.87