Finding the Fourth Proportional to 1,337.34, 2,005.20 and 874.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,337.34 : 2,005.20 = 874.56 : x
2. Step 2: Convert to fraction form
   1,337.34/2,005.20 = 874.56/x
3. Step 3: Cross multiply
   1,337.34x = 2,005.20 × 874.56
4. Step 4: Simplify right side
   1,337.34x = 1,753,667.71
5. Step 5: Solve for x
   x = 1,753,667.71/1,337.34
6. Step 6: Final answer
   x = 1,311.31