Finding the Fourth Proportional to 1,500.71, 2,070.71 and 871.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,500.71 : 2,070.71 = 871.31 : x
2. Step 2: Convert to fraction form
   1,500.71/2,070.71 = 871.31/x
3. Step 3: Cross multiply
   1,500.71x = 2,070.71 × 871.31
4. Step 4: Simplify right side
   1,500.71x = 1,804,225.97
5. Step 5: Solve for x
   x = 1,804,225.97/1,500.71
6. Step 6: Final answer
   x = 1,202.25