Finding the Fourth Proportional to 1,377.63, 1,899.69 and 958.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.63 : 1,899.69 = 958.45 : x
2. Step 2: Convert to fraction form
   1,377.63/1,899.69 = 958.45/x
3. Step 3: Cross multiply
   1,377.63x = 1,899.69 × 958.45
4. Step 4: Simplify right side
   1,377.63x = 1,820,757.88
5. Step 5: Solve for x
   x = 1,820,757.88/1,377.63
6. Step 6: Final answer
   x = 1,321.66