Finding the Fourth Proportional to 1,419.35, 2,126.70 and 870.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.35 : 2,126.70 = 870.37 : x
2. Step 2: Convert to fraction form
   1,419.35/2,126.70 = 870.37/x
3. Step 3: Cross multiply
   1,419.35x = 2,126.70 × 870.37
4. Step 4: Simplify right side
   1,419.35x = 1,851,015.88
5. Step 5: Solve for x
   x = 1,851,015.88/1,419.35
6. Step 6: Final answer
   x = 1,304.13