Finding the Fourth Proportional to 1,047.38, 1,561.45 and 965.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.38 : 1,561.45 = 965.18 : x
2. Step 2: Convert to fraction form
   1,047.38/1,561.45 = 965.18/x
3. Step 3: Cross multiply
   1,047.38x = 1,561.45 × 965.18
4. Step 4: Simplify right side
   1,047.38x = 1,507,080.31
5. Step 5: Solve for x
   x = 1,507,080.31/1,047.38
6. Step 6: Final answer
   x = 1,438.90