Finding the Fourth Proportional to 2,061.30, 3,091.08 and 874.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,061.30 : 3,091.08 = 874.86 : x
2. Step 2: Convert to fraction form
   2,061.30/3,091.08 = 874.86/x
3. Step 3: Cross multiply
   2,061.30x = 3,091.08 × 874.86
4. Step 4: Simplify right side
   2,061.30x = 2,704,262.25
5. Step 5: Solve for x
   x = 2,704,262.25/2,061.30
6. Step 6: Final answer
   x = 1,311.92