Finding the Fourth Proportional to 1,784.58, 2,674.17 and 1,321.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,784.58 : 2,674.17 = 1,321.62 : x
2. Step 2: Convert to fraction form
   1,784.58/2,674.17 = 1,321.62/x
3. Step 3: Cross multiply
   1,784.58x = 2,674.17 × 1,321.62
4. Step 4: Simplify right side
   1,784.58x = 3,534,236.56
5. Step 5: Solve for x
   x = 3,534,236.56/1,784.58
6. Step 6: Final answer
   x = 1,980.43