Finding the Fourth Proportional to 1,335.89, 1,842.55 and 964.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,335.89 : 1,842.55 = 964.10 : x
2. Step 2: Convert to fraction form
   1,335.89/1,842.55 = 964.10/x
3. Step 3: Cross multiply
   1,335.89x = 1,842.55 × 964.10
4. Step 4: Simplify right side
   1,335.89x = 1,776,404.65
5. Step 5: Solve for x
   x = 1,776,404.65/1,335.89
6. Step 6: Final answer
   x = 1,329.75