Finding the Fourth Proportional to 1,967.96, 2,715.83 and 1,128.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,967.96 : 2,715.83 = 1,128.57 : x
2. Step 2: Convert to fraction form
   1,967.96/2,715.83 = 1,128.57/x
3. Step 3: Cross multiply
   1,967.96x = 2,715.83 × 1,128.57
4. Step 4: Simplify right side
   1,967.96x = 3,064,992.67
5. Step 5: Solve for x
   x = 3,064,992.67/1,967.96
6. Step 6: Final answer
   x = 1,557.44