Finding the Fourth Proportional to 2,311.02, 3,189.72 and 1,427.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,311.02 : 3,189.72 = 1,427.76 : x
2. Step 2: Convert to fraction form
   2,311.02/3,189.72 = 1,427.76/x
3. Step 3: Cross multiply
   2,311.02x = 3,189.72 × 1,427.76
4. Step 4: Simplify right side
   2,311.02x = 4,554,154.63
5. Step 5: Solve for x
   x = 4,554,154.63/2,311.02
6. Step 6: Final answer
   x = 1,970.63