Finding the Fourth Proportional to 1,376.69, 2,061.61 and 963.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.69 : 2,061.61 = 963.89 : x
2. Step 2: Convert to fraction form
   1,376.69/2,061.61 = 963.89/x
3. Step 3: Cross multiply
   1,376.69x = 2,061.61 × 963.89
4. Step 4: Simplify right side
   1,376.69x = 1,987,165.26
5. Step 5: Solve for x
   x = 1,987,165.26/1,376.69
6. Step 6: Final answer
   x = 1,443.44