Finding the Fourth Proportional to 1,419.15, 2,133.27 and 1,317.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.15 : 2,133.27 = 1,317.69 : x
2. Step 2: Convert to fraction form
   1,419.15/2,133.27 = 1,317.69/x
3. Step 3: Cross multiply
   1,419.15x = 2,133.27 × 1,317.69
4. Step 4: Simplify right side
   1,419.15x = 2,810,988.55
5. Step 5: Solve for x
   x = 2,810,988.55/1,419.15
6. Step 6: Final answer
   x = 1,980.76