Finding the Fourth Proportional to 2,792.13, 4,189.34 and 1,231.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,792.13 : 4,189.34 = 1,231.30 : x
2. Step 2: Convert to fraction form
   2,792.13/4,189.34 = 1,231.30/x
3. Step 3: Cross multiply
   2,792.13x = 4,189.34 × 1,231.30
4. Step 4: Simplify right side
   2,792.13x = 5,158,334.34
5. Step 5: Solve for x
   x = 5,158,334.34/2,792.13
6. Step 6: Final answer
   x = 1,847.45