Finding the Fourth Proportional to 2,310.71, 3,188.79 and 1,262.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,310.71 : 3,188.79 = 1,262.76 : x
2. Step 2: Convert to fraction form
   2,310.71/3,188.79 = 1,262.76/x
3. Step 3: Cross multiply
   2,310.71x = 3,188.79 × 1,262.76
4. Step 4: Simplify right side
   2,310.71x = 4,026,676.46
5. Step 5: Solve for x
   x = 4,026,676.46/2,310.71
6. Step 6: Final answer
   x = 1,742.62