Finding the Fourth Proportional to 1,780.84, 2,457.98 and 1,151.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.84 : 2,457.98 = 1,151.61 : x
2. Step 2: Convert to fraction form
   1,780.84/2,457.98 = 1,151.61/x
3. Step 3: Cross multiply
   1,780.84x = 2,457.98 × 1,151.61
4. Step 4: Simplify right side
   1,780.84x = 2,830,634.35
5. Step 5: Solve for x
   x = 2,830,634.35/1,780.84
6. Step 6: Final answer
   x = 1,589.49