Finding the Fourth Proportional to 1,419.57, 1,958.25 and 977.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.57 : 1,958.25 = 977.70 : x
2. Step 2: Convert to fraction form
   1,419.57/1,958.25 = 977.70/x
3. Step 3: Cross multiply
   1,419.57x = 1,958.25 × 977.70
4. Step 4: Simplify right side
   1,419.57x = 1,914,581.03
5. Step 5: Solve for x
   x = 1,914,581.03/1,419.57
6. Step 6: Final answer
   x = 1,348.70