Finding the Fourth Proportional to 2,191.08, 3,276.63 and 1,636.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.08 : 3,276.63 = 1,636.18 : x
2. Step 2: Convert to fraction form
   2,191.08/3,276.63 = 1,636.18/x
3. Step 3: Cross multiply
   2,191.08x = 3,276.63 × 1,636.18
4. Step 4: Simplify right side
   2,191.08x = 5,361,156.47
5. Step 5: Solve for x
   x = 5,361,156.47/2,191.08
6. Step 6: Final answer
   x = 2,446.81