Finding the Fourth Proportional to 1,967.69, 2,715.38 and 1,128.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,967.69 : 2,715.38 = 1,128.37 : x
2. Step 2: Convert to fraction form
   1,967.69/2,715.38 = 1,128.37/x
3. Step 3: Cross multiply
   1,967.69x = 2,715.38 × 1,128.37
4. Step 4: Simplify right side
   1,967.69x = 3,063,947.69
5. Step 5: Solve for x
   x = 3,063,947.69/1,967.69
6. Step 6: Final answer
   x = 1,557.13