Finding the Fourth Proportional to 2,091.16, 3,130.56 and 1,308.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.16 : 3,130.56 = 1,308.58 : x
2. Step 2: Convert to fraction form
   2,091.16/3,130.56 = 1,308.58/x
3. Step 3: Cross multiply
   2,091.16x = 3,130.56 × 1,308.58
4. Step 4: Simplify right side
   2,091.16x = 4,096,588.20
5. Step 5: Solve for x
   x = 4,096,588.20/2,091.16
6. Step 6: Final answer
   x = 1,959.00