Finding the Fourth Proportional to 1,194.17, 1,789.56 and 1,128.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,194.17 : 1,789.56 = 1,128.45 : x
2. Step 2: Convert to fraction form
   1,194.17/1,789.56 = 1,128.45/x
3. Step 3: Cross multiply
   1,194.17x = 1,789.56 × 1,128.45
4. Step 4: Simplify right side
   1,194.17x = 2,019,428.98
5. Step 5: Solve for x
   x = 2,019,428.98/1,194.17
6. Step 6: Final answer
   x = 1,691.07