Finding the Fourth Proportional to 1,601.18, 2,209.78 and 971.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,601.18 : 2,209.78 = 971.56 : x
2. Step 2: Convert to fraction form
   1,601.18/2,209.78 = 971.56/x
3. Step 3: Cross multiply
   1,601.18x = 2,209.78 × 971.56
4. Step 4: Simplify right side
   1,601.18x = 2,146,942.49
5. Step 5: Solve for x
   x = 2,146,942.49/1,601.18
6. Step 6: Final answer
   x = 1,340.85