Finding the Fourth Proportional to 1,419.55, 1,966.57 and 1,385.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.55 : 1,966.57 = 1,385.53 : x
2. Step 2: Convert to fraction form
   1,419.55/1,966.57 = 1,385.53/x
3. Step 3: Cross multiply
   1,419.55x = 1,966.57 × 1,385.53
4. Step 4: Simplify right side
   1,419.55x = 2,724,733.35
5. Step 5: Solve for x
   x = 2,724,733.35/1,419.55
6. Step 6: Final answer
   x = 1,919.44