Finding the Fourth Proportional to 2,636.13, 3,953.89 and 1,074.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.13 : 3,953.89 = 1,074.55 : x
2. Step 2: Convert to fraction form
   2,636.13/3,953.89 = 1,074.55/x
3. Step 3: Cross multiply
   2,636.13x = 3,953.89 × 1,074.55
4. Step 4: Simplify right side
   2,636.13x = 4,248,652.50
5. Step 5: Solve for x
   x = 4,248,652.50/2,636.13
6. Step 6: Final answer
   x = 1,611.70