Finding the Fourth Proportional to 1,967.45, 2,715.23 and 1,128.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,967.45 : 2,715.23 = 1,128.42 : x
2. Step 2: Convert to fraction form
   1,967.45/2,715.23 = 1,128.42/x
3. Step 3: Cross multiply
   1,967.45x = 2,715.23 × 1,128.42
4. Step 4: Simplify right side
   1,967.45x = 3,063,922.66
5. Step 5: Solve for x
   x = 3,063,922.66/1,967.45
6. Step 6: Final answer
   x = 1,557.31