Finding the Fourth Proportional to 1,173.69, 1,615.41 and 841.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,173.69 : 1,615.41 = 841.59 : x
2. Step 2: Convert to fraction form
   1,173.69/1,615.41 = 841.59/x
3. Step 3: Cross multiply
   1,173.69x = 1,615.41 × 841.59
4. Step 4: Simplify right side
   1,173.69x = 1,359,512.90
5. Step 5: Solve for x
   x = 1,359,512.90/1,173.69
6. Step 6: Final answer
   x = 1,158.32