Finding the Fourth Proportional to 2,116.65, 2,921.52 and 1,409.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.65 : 2,921.52 = 1,409.67 : x
2. Step 2: Convert to fraction form
   2,116.65/2,921.52 = 1,409.67/x
3. Step 3: Cross multiply
   2,116.65x = 2,921.52 × 1,409.67
4. Step 4: Simplify right side
   2,116.65x = 4,118,379.10
5. Step 5: Solve for x
   x = 4,118,379.10/2,116.65
6. Step 6: Final answer
   x = 1,945.71