Finding the Fourth Proportional to 1,395.72, 2,091.84 and 1,222.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.72 : 2,091.84 = 1,222.02 : x
2. Step 2: Convert to fraction form
   1,395.72/2,091.84 = 1,222.02/x
3. Step 3: Cross multiply
   1,395.72x = 2,091.84 × 1,222.02
4. Step 4: Simplify right side
   1,395.72x = 2,556,270.32
5. Step 5: Solve for x
   x = 2,556,270.32/1,395.72
6. Step 6: Final answer
   x = 1,831.51