Finding the Fourth Proportional to 1,402.59, 1,935.72 and 871.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.59 : 1,935.72 = 871.59 : x
2. Step 2: Convert to fraction form
   1,402.59/1,935.72 = 871.59/x
3. Step 3: Cross multiply
   1,402.59x = 1,935.72 × 871.59
4. Step 4: Simplify right side
   1,402.59x = 1,687,154.19
5. Step 5: Solve for x
   x = 1,687,154.19/1,402.59
6. Step 6: Final answer
   x = 1,202.88