Finding the Fourth Proportional to 1,967.84, 2,715.60 and 1,128.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,967.84 : 2,715.60 = 1,128.54 : x
2. Step 2: Convert to fraction form
   1,967.84/2,715.60 = 1,128.54/x
3. Step 3: Cross multiply
   1,967.84x = 2,715.60 × 1,128.54
4. Step 4: Simplify right side
   1,967.84x = 3,064,663.22
5. Step 5: Solve for x
   x = 3,064,663.22/1,967.84
6. Step 6: Final answer
   x = 1,557.37