Finding the Fourth Proportional to 2,091.24, 3,130.38 and 1,320.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.24 : 3,130.38 = 1,320.12 : x
2. Step 2: Convert to fraction form
   2,091.24/3,130.38 = 1,320.12/x
3. Step 3: Cross multiply
   2,091.24x = 3,130.38 × 1,320.12
4. Step 4: Simplify right side
   2,091.24x = 4,132,477.25
5. Step 5: Solve for x
   x = 4,132,477.25/2,091.24
6. Step 6: Final answer
   x = 1,976.09