Finding the Fourth Proportional to 1,967.38, 2,715.05 and 1,128.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,967.38 : 2,715.05 = 1,128.17 : x
2. Step 2: Convert to fraction form
   1,967.38/2,715.05 = 1,128.17/x
3. Step 3: Cross multiply
   1,967.38x = 2,715.05 × 1,128.17
4. Step 4: Simplify right side
   1,967.38x = 3,063,047.57
5. Step 5: Solve for x
   x = 3,063,047.57/1,967.38
6. Step 6: Final answer
   x = 1,556.92