Finding the Fourth Proportional to 2,085.72, 3,123.12 and 1,353.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.72 : 3,123.12 = 1,353.08 : x
2. Step 2: Convert to fraction form
   2,085.72/3,123.12 = 1,353.08/x
3. Step 3: Cross multiply
   2,085.72x = 3,123.12 × 1,353.08
4. Step 4: Simplify right side
   2,085.72x = 4,225,831.21
5. Step 5: Solve for x
   x = 4,225,831.21/2,085.72
6. Step 6: Final answer
   x = 2,026.08