Finding the Fourth Proportional to 1,780.35, 2,457.32 and 1,082.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.35 : 2,457.32 = 1,082.31 : x
2. Step 2: Convert to fraction form
   1,780.35/2,457.32 = 1,082.31/x
3. Step 3: Cross multiply
   1,780.35x = 2,457.32 × 1,082.31
4. Step 4: Simplify right side
   1,780.35x = 2,659,582.01
5. Step 5: Solve for x
   x = 2,659,582.01/1,780.35
6. Step 6: Final answer
   x = 1,493.85