Finding the Fourth Proportional to 1,171.01, 1,615.86 and 646.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.01 : 1,615.86 = 646.94 : x
2. Step 2: Convert to fraction form
   1,171.01/1,615.86 = 646.94/x
3. Step 3: Cross multiply
   1,171.01x = 1,615.86 × 646.94
4. Step 4: Simplify right side
   1,171.01x = 1,045,356.39
5. Step 5: Solve for x
   x = 1,045,356.39/1,171.01
6. Step 6: Final answer
   x = 892.70