Finding the Fourth Proportional to 2,810.89, 4,215.73 and 962.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,810.89 : 4,215.73 = 962.07 : x
2. Step 2: Convert to fraction form
   2,810.89/4,215.73 = 962.07/x
3. Step 3: Cross multiply
   2,810.89x = 4,215.73 × 962.07
4. Step 4: Simplify right side
   2,810.89x = 4,055,827.36
5. Step 5: Solve for x
   x = 4,055,827.36/2,810.89
6. Step 6: Final answer
   x = 1,442.90