Finding the Fourth Proportional to 1,419.29, 1,958.87 and 830.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.29 : 1,958.87 = 830.15 : x
2. Step 2: Convert to fraction form
   1,419.29/1,958.87 = 830.15/x
3. Step 3: Cross multiply
   1,419.29x = 1,958.87 × 830.15
4. Step 4: Simplify right side
   1,419.29x = 1,626,155.93
5. Step 5: Solve for x
   x = 1,626,155.93/1,419.29
6. Step 6: Final answer
   x = 1,145.75