Finding the Fourth Proportional to 1,337.50, 2,001.99 and 871.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,337.50 : 2,001.99 = 871.55 : x
2. Step 2: Convert to fraction form
   1,337.50/2,001.99 = 871.55/x
3. Step 3: Cross multiply
   1,337.50x = 2,001.99 × 871.55
4. Step 4: Simplify right side
   1,337.50x = 1,744,834.38
5. Step 5: Solve for x
   x = 1,744,834.38/1,337.50
6. Step 6: Final answer
   x = 1,304.55