Finding the Fourth Proportional to 1,956.50, 2,699.96 and 1,072.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,956.50 : 2,699.96 = 1,072.31 : x
2. Step 2: Convert to fraction form
   1,956.50/2,699.96 = 1,072.31/x
3. Step 3: Cross multiply
   1,956.50x = 2,699.96 × 1,072.31
4. Step 4: Simplify right side
   1,956.50x = 2,895,175.25
5. Step 5: Solve for x
   x = 2,895,175.25/1,956.50
6. Step 6: Final answer
   x = 1,479.78