Finding the Fourth Proportional to 2,085.15, 3,126.16 and 1,263.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.15 : 3,126.16 = 1,263.23 : x
2. Step 2: Convert to fraction form
   2,085.15/3,126.16 = 1,263.23/x
3. Step 3: Cross multiply
   2,085.15x = 3,126.16 × 1,263.23
4. Step 4: Simplify right side
   2,085.15x = 3,949,059.10
5. Step 5: Solve for x
   x = 3,949,059.10/2,085.15
6. Step 6: Final answer
   x = 1,893.90