Finding the Fourth Proportional to 1,909.56, 2,858.10 and 1,179.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,909.56 : 2,858.10 = 1,179.72 : x
2. Step 2: Convert to fraction form
   1,909.56/2,858.10 = 1,179.72/x
3. Step 3: Cross multiply
   1,909.56x = 2,858.10 × 1,179.72
4. Step 4: Simplify right side
   1,909.56x = 3,371,757.73
5. Step 5: Solve for x
   x = 3,371,757.73/1,909.56
6. Step 6: Final answer
   x = 1,765.72