Finding the Fourth Proportional to 1,171.03, 1,616.06 and 647.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.03 : 1,616.06 = 647.05 : x
2. Step 2: Convert to fraction form
   1,171.03/1,616.06 = 647.05/x
3. Step 3: Cross multiply
   1,171.03x = 1,616.06 × 647.05
4. Step 4: Simplify right side
   1,171.03x = 1,045,671.62
5. Step 5: Solve for x
   x = 1,045,671.62/1,171.03
6. Step 6: Final answer
   x = 892.95