Finding the Fourth Proportional to 2,062.50, 3,091.08 and 1,321.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,062.50 : 3,091.08 = 1,321.80 : x
2. Step 2: Convert to fraction form
   2,062.50/3,091.08 = 1,321.80/x
3. Step 3: Cross multiply
   2,062.50x = 3,091.08 × 1,321.80
4. Step 4: Simplify right side
   2,062.50x = 4,085,789.54
5. Step 5: Solve for x
   x = 4,085,789.54/2,062.50
6. Step 6: Final answer
   x = 1,980.99