Finding the Fourth Proportional to 2,091.20, 3,132.54 and 1,678.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.20 : 3,132.54 = 1,678.10 : x
2. Step 2: Convert to fraction form
   2,091.20/3,132.54 = 1,678.10/x
3. Step 3: Cross multiply
   2,091.20x = 3,132.54 × 1,678.10
4. Step 4: Simplify right side
   2,091.20x = 5,256,699.71
5. Step 5: Solve for x
   x = 5,256,699.71/2,091.20
6. Step 6: Final answer
   x = 2,513.73