Finding the Fourth Proportional to 1,554.69, 2,145.67 and 965.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.69 : 2,145.67 = 965.31 : x
2. Step 2: Convert to fraction form
   1,554.69/2,145.67 = 965.31/x
3. Step 3: Cross multiply
   1,554.69x = 2,145.67 × 965.31
4. Step 4: Simplify right side
   1,554.69x = 2,071,236.71
5. Step 5: Solve for x
   x = 2,071,236.71/1,554.69
6. Step 6: Final answer
   x = 1,332.25