Finding the Fourth Proportional to 2,124.50, 3,184.36 and 1,081.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.50 : 3,184.36 = 1,081.57 : x
2. Step 2: Convert to fraction form
   2,124.50/3,184.36 = 1,081.57/x
3. Step 3: Cross multiply
   2,124.50x = 3,184.36 × 1,081.57
4. Step 4: Simplify right side
   2,124.50x = 3,444,102.84
5. Step 5: Solve for x
   x = 3,444,102.84/2,124.50
6. Step 6: Final answer
   x = 1,621.14