Finding the Fourth Proportional to 1,555.59, 2,146.56 and 957.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.59 : 2,146.56 = 957.99 : x
2. Step 2: Convert to fraction form
   1,555.59/2,146.56 = 957.99/x
3. Step 3: Cross multiply
   1,555.59x = 2,146.56 × 957.99
4. Step 4: Simplify right side
   1,555.59x = 2,056,383.01
5. Step 5: Solve for x
   x = 2,056,383.01/1,555.59
6. Step 6: Final answer
   x = 1,321.93