Finding the Fourth Proportional to 2,311.08, 3,188.72 and 1,426.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,311.08 : 3,188.72 = 1,426.92 : x
2. Step 2: Convert to fraction form
   2,311.08/3,188.72 = 1,426.92/x
3. Step 3: Cross multiply
   2,311.08x = 3,188.72 × 1,426.92
4. Step 4: Simplify right side
   2,311.08x = 4,550,048.34
5. Step 5: Solve for x
   x = 4,550,048.34/2,311.08
6. Step 6: Final answer
   x = 1,968.80