Finding the Fourth Proportional to 1,601.61, 2,391.59 and 1,309.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,601.61 : 2,391.59 = 1,309.67 : x
2. Step 2: Convert to fraction form
   1,601.61/2,391.59 = 1,309.67/x
3. Step 3: Cross multiply
   1,601.61x = 2,391.59 × 1,309.67
4. Step 4: Simplify right side
   1,601.61x = 3,132,193.96
5. Step 5: Solve for x
   x = 3,132,193.96/1,601.61
6. Step 6: Final answer
   x = 1,955.66