Finding the Fourth Proportional to 2,124.72, 3,188.52 and 1,636.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.72 : 3,188.52 = 1,636.08 : x
2. Step 2: Convert to fraction form
   2,124.72/3,188.52 = 1,636.08/x
3. Step 3: Cross multiply
   2,124.72x = 3,188.52 × 1,636.08
4. Step 4: Simplify right side
   2,124.72x = 5,216,673.80
5. Step 5: Solve for x
   x = 5,216,673.80/2,124.72
6. Step 6: Final answer
   x = 2,455.23