Finding the Fourth Proportional to 3,609.83, 4,981.59 and 2,117.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,609.83 : 4,981.59 = 2,117.78 : x
2. Step 2: Convert to fraction form
   3,609.83/4,981.59 = 2,117.78/x
3. Step 3: Cross multiply
   3,609.83x = 4,981.59 × 2,117.78
4. Step 4: Simplify right side
   3,609.83x = 10,549,886.76
5. Step 5: Solve for x
   x = 10,549,886.76/3,609.83
6. Step 6: Final answer
   x = 2,922.55