Finding the Fourth Proportional to 1,167.06, 1,749.15 and 647.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,167.06 : 1,749.15 = 647.04 : x
2. Step 2: Convert to fraction form
   1,167.06/1,749.15 = 647.04/x
3. Step 3: Cross multiply
   1,167.06x = 1,749.15 × 647.04
4. Step 4: Simplify right side
   1,167.06x = 1,131,770.02
5. Step 5: Solve for x
   x = 1,131,770.02/1,167.06
6. Step 6: Final answer
   x = 969.76