Finding the Fourth Proportional to 1,419.72, 2,126.43 and 870.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.72 : 2,126.43 = 870.23 : x
2. Step 2: Convert to fraction form
   1,419.72/2,126.43 = 870.23/x
3. Step 3: Cross multiply
   1,419.72x = 2,126.43 × 870.23
4. Step 4: Simplify right side
   1,419.72x = 1,850,483.18
5. Step 5: Solve for x
   x = 1,850,483.18/1,419.72
6. Step 6: Final answer
   x = 1,303.41