Finding the Fourth Proportional to 1,420.52, 2,127.69 and 871.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,420.52 : 2,127.69 = 871.07 : x
2. Step 2: Convert to fraction form
   1,420.52/2,127.69 = 871.07/x
3. Step 3: Cross multiply
   1,420.52x = 2,127.69 × 871.07
4. Step 4: Simplify right side
   1,420.52x = 1,853,356.29
5. Step 5: Solve for x
   x = 1,853,356.29/1,420.52
6. Step 6: Final answer
   x = 1,304.71