Finding the Fourth Proportional to 1,501.19, 2,071.81 and 871.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,501.19 : 2,071.81 = 871.60 : x
2. Step 2: Convert to fraction form
   1,501.19/2,071.81 = 871.60/x
3. Step 3: Cross multiply
   1,501.19x = 2,071.81 × 871.60
4. Step 4: Simplify right side
   1,501.19x = 1,805,789.60
5. Step 5: Solve for x
   x = 1,805,789.60/1,501.19
6. Step 6: Final answer
   x = 1,202.91