Finding the Fourth Proportional to 3,609.32, 4,981.32 and 2,117.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,609.32 : 4,981.32 = 2,117.81 : x
2. Step 2: Convert to fraction form
   3,609.32/4,981.32 = 2,117.81/x
3. Step 3: Cross multiply
   3,609.32x = 4,981.32 × 2,117.81
4. Step 4: Simplify right side
   3,609.32x = 10,549,464.40
5. Step 5: Solve for x
   x = 10,549,464.40/3,609.32
6. Step 6: Final answer
   x = 2,922.84