Finding the Fourth Proportional to 1,215.37, 1,820.96 and 957.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215.37 : 1,820.96 = 957.02 : x
2. Step 2: Convert to fraction form
   1,215.37/1,820.96 = 957.02/x
3. Step 3: Cross multiply
   1,215.37x = 1,820.96 × 957.02
4. Step 4: Simplify right side
   1,215.37x = 1,742,698.50
5. Step 5: Solve for x
   x = 1,742,698.50/1,215.37
6. Step 6: Final answer
   x = 1,433.89