Finding the Fourth Proportional to 2,085.50, 3,128.63 and 1,045.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.50 : 3,128.63 = 1,045.55 : x
2. Step 2: Convert to fraction form
   2,085.50/3,128.63 = 1,045.55/x
3. Step 3: Cross multiply
   2,085.50x = 3,128.63 × 1,045.55
4. Step 4: Simplify right side
   2,085.50x = 3,271,118.23
5. Step 5: Solve for x
   x = 3,271,118.23/2,085.50
6. Step 6: Final answer
   x = 1,568.51