Finding the Fourth Proportional to 1,173.69, 1,618.38 and 1,027.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,173.69 : 1,618.38 = 1,027.89 : x
2. Step 2: Convert to fraction form
   1,173.69/1,618.38 = 1,027.89/x
3. Step 3: Cross multiply
   1,173.69x = 1,618.38 × 1,027.89
4. Step 4: Simplify right side
   1,173.69x = 1,663,516.62
5. Step 5: Solve for x
   x = 1,663,516.62/1,173.69
6. Step 6: Final answer
   x = 1,417.34