Finding the Fourth Proportional to 1,500.69, 2,070.39 and 871.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,500.69 : 2,070.39 = 871.12 : x
2. Step 2: Convert to fraction form
   1,500.69/2,070.39 = 871.12/x
3. Step 3: Cross multiply
   1,500.69x = 2,070.39 × 871.12
4. Step 4: Simplify right side
   1,500.69x = 1,803,563.99
5. Step 5: Solve for x
   x = 1,803,563.99/1,500.69
6. Step 6: Final answer
   x = 1,201.82