Finding the Fourth Proportional to 1,555.31, 2,145.52 and 964.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.31 : 2,145.52 = 964.82 : x
2. Step 2: Convert to fraction form
   1,555.31/2,145.52 = 964.82/x
3. Step 3: Cross multiply
   1,555.31x = 2,145.52 × 964.82
4. Step 4: Simplify right side
   1,555.31x = 2,070,040.61
5. Step 5: Solve for x
   x = 2,070,040.61/1,555.31
6. Step 6: Final answer
   x = 1,330.95