Finding the Fourth Proportional to 2,311.32, 3,189.95 and 1,316.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,311.32 : 3,189.95 = 1,316.69 : x
2. Step 2: Convert to fraction form
   2,311.32/3,189.95 = 1,316.69/x
3. Step 3: Cross multiply
   2,311.32x = 3,189.95 × 1,316.69
4. Step 4: Simplify right side
   2,311.32x = 4,200,152.73
5. Step 5: Solve for x
   x = 4,200,152.73/2,311.32
6. Step 6: Final answer
   x = 1,817.21