Finding the Fourth Proportional to 1,879.58, 2,820.72 and 1,186.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,879.58 : 2,820.72 = 1,186.76 : x
2. Step 2: Convert to fraction form
   1,879.58/2,820.72 = 1,186.76/x
3. Step 3: Cross multiply
   1,879.58x = 2,820.72 × 1,186.76
4. Step 4: Simplify right side
   1,879.58x = 3,347,517.67
5. Step 5: Solve for x
   x = 3,347,517.67/1,879.58
6. Step 6: Final answer
   x = 1,780.99